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Hello everyone.



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So in the last five year deals we learned about this object oriented programming but it's a different



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concept.



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How to create object what our construct built and how to use them.



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So we have learned a lot of things in object oriented programming.



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So now let us create a class with the help of everything that we have learned till now to gain confidence



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and to make things more clear.



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Okay.



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So let us create a friction class.



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So in Matt



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in maths the example of affection is like five by seven.



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Five is the numerator and seven is the dominator that circle represent these type of numbers.



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And to perform operation on these type of numbers we want to create a fraction class.



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Okay so infection class we will have two properties numerator and denominator.



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These two will be the properties of our friction class.



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And both the properties will be private.



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Okay.



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What the properties will be private.



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So 5 is the numerator and seven is the denominator.



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Okay.



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So let's see in gold.



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So here I am creating only one class.



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If you want what you can do is you can create a class action lawsuit BP sorry you can create a file



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function or TPP and other file fraction use Nazi BP but I am creating only one file.



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Okay so it's totally our choice.



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So class friction



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now we want to properties what the properties will be private.



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So and numerator



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and denominator.



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Now what I want to do is



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now what I want to do is whenever we create the object of this class whenever you create the object



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of friction class numerator and denominator should not contain God which values.



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Okay numerator and denominator should not contain garbage values.



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So how can we ensure that.



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How can we enforce our user to give the values of numerator and denominator.



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So the idea is very simple.



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We will we will make a better met based constructor and as soon as we make a parameters constructor



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default constructor is not visible to us anymore.



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So in this way we can force our user to give the values of numerator and denominator.



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Okay so let's create a better make based function it will take numerator and denominator as input and



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then we will copy the value of numerator and denominator into our properties so numerator close numerator



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and denominator it goes denominator so in this fashion we will force our user to give the values of



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numerator and denominator.



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Hence if the user wants to create our objective function class numerator and denominator will never



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contain garbage values.



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Okay.



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So are these two lines correct.



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Will these two lines work.



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No this will not work.



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And why will not work because the property name is a mess.



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Function name the property name is a mess parameter name.



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So we have to use this keyword.



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Using this is mandatory here.



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Okay.



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So now how do we create the object of defection class.



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So we will create object in this section.



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Fraction let's call it F1.



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So the numerator is spent and there the other night is 5.



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So the numerator will contain 10 denominator will contain two



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and this is our function F1 okay.



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Now let us create a print function.



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So what does print function will do.



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It will print our affection in this manner then followed slash too.



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Okay so what do the signature of brain function what was written by between 5 will be void because we



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are not returning anything.



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Print and then some called.



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Okay.



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And how we will call this function will call this function with the help of an object.



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So if one dot print the value of f1 F1 will be stored in the this keyword of the brain function with



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the help of this we can access the properties of F1.



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So private function of public or private it will be public because the race object cannot call it certain



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type is void because we are not pretending anything.



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No input argument no object which will call the print function the object will be stored in this.



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So see out



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this ad or numerator then forward slash and this ETL denominator.



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Okay so using this is optional here if you will not write this Okay so using this is optional here we



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can also remove it.



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Here so whenever the object will call the print function F1 not print the value of f1 will be stored



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in this and with the help of this we can access the properties of the object Okay now let us create



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one more function we want to create a function and we want to create a function that lets say we have



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to function.



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It will create a function that lets say we have to friction.



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If when the value of a fund let's say 10 by to an infection F2 which is like 15 by food okay.



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So what are the second nature of add a function.



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So Ed f1 f2 it will take to function as input.



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Is this right or wrong it is wrong.



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Why.



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Because to call a function we need an object.



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Okay to call a function we need an object.



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So F1 will call object will call this function.



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So what what will be the input parameter the vertically the argument for that function since F1 calls



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the ad that this give out of the added function will store F1.



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And now we won't have to solve the root pass after his input so it will take only one argument and not



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two.



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Okay.



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Vinod to argument because F1 is stored in this key word of the ad function and we will pass F2 and similarly



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it can perform its operation okay.



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So what is our expectation what is our aim.



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Our aim is we want to update the result of F1 plus F2 into F1 we will add these two friction f1 plus



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F2 and we'll store the result in F1 we will update F1 and F2 will remain unchanged and we do not want



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to create any new friction.



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So the return type will be void.



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We do not want to create any new friction the Dalton type will be void and we want to update F1 and



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have to will remain unchanged.



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Now how to add two functions.



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What is the procedure for adding two functions.



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So the procedure is very simple.



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Let's say the two factions are then by two.



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And the second function is 15 by four then by two and 15 by four.



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So first of all we will take a team and Sam is four.



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But now for simplicity let's make a date for simplicity let's make a date.



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Okay.



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So here it is not clearly visible.



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So let's say the two factions are F1 and have two.



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So F1 is then by two and F2 is 15 by four.



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So how can we are two functions.



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So first of all we have to take the Elysium of the denominator so that she moves forward but for simplicity



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let's make a date.



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So what will happen to the numerator.



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So this 10 will guard multiply it by four.



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How four because eight by two is four.



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Similarly this 15 will get multiplied by two and from where to game it is simply eight by four is to



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so into two.



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So a 40 plus 30 by eight.



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So our dessert should be 70 by eight okay.



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So for now let's call it X and let's call it Y Okay.



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So what is x x is simply the LTM divided by the denominator and what is y y is and it's him divided



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by the number trough F2.



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And where does Elysium Sam is denominator of f1 plus.



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So how do you multiply the merit of F2 the amount of F1 multiplied denominator of F2.



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Okay so let's include



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so we want to create and function and add function will be public or private.



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It will be public because we will call it from the mean but it will take it will take function as input



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faction F to its name it F2.



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So first of all we have to calculate Elysium.



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So Elysium is very simple Bernard Madoff.



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If one multiply the amount of F2 so F2 dart denominator



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so using this is optional here why optional.



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Because who will call add an object will call and F when will call add and F1 will be stored in this.



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So this simply means F1 here.



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So using this is optional here you can also remove this.



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OK so Will this Terminator and basically means this added denominator.



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OK now let us consider the value of x and y



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so X is very simple axiom divided by denominator of F1 so a denominator you can write this entertainment



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also.



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And similarly Y is also very simple.



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Vi is I would see him divided by after dark denominator.



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Okay so using this is optional here



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and here it is mandated to use this



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so using this is optional here.



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Okay.



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Now what was our aim.



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So first of all let us calculate the numerator also.



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So in the numerator is X Multiply numerator of f one so you can sum better numerator or you can write



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this item numerator plus via multiply F2 dark numerator numerator trough F2



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now as we discussed store the desert and effluent stored desert in F1 after will remain unchanged so



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this add on numerator



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is and you m



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this error denominator then write off F1 is Elysium Okay so optional using this is optional because



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it is implicit Okay so what will happen



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so let's say there are two factions are F1 is 10 by 2 and F2 is 15 by 4 so numerator condensed in detrimental



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contains 2 This is F1 numeric res 15 business days for and this is F2 so what else can we do.



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What do the effect of line number 18 so they rather multiply after dark matter and so to multiply for



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it.



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So Elysium is it now what do the value of x axis so X is Elysium which is it divided by the amount of



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F1 so it by 2 which is food what is y and see him divided by denominator of F2 which is 2 now what will



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be the numerator so the numerator is X which is food multiplied in a trough F1 or we can say this idea



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numerator then plus what are the value of y which is to multiply fifteen so this comes out to be seventy



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and then we will store the desert in F1 so of destroying the resulting F1 this header numerator is and



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you him let's say this addresses seven hundred so this contains that function this given of that function



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contains seven hundred.



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So this idea the military's and you m so it will become seventy and this will become this Saturday night



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it is an essential item is 8 so this will become 8.



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So finally for F when the numerator is seventy and their denominator is eight so if one is seventy by



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eight and F2 is fifteen by four.



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So this was our aim after all remains unchanged after remains unchanged and F1 got abated so F1 became



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f1 plus F2 OK now ideally now ideally F1 is seventy by eight but this is not simplified after simplifying



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we will divide it by two so it will become thirty five by four.



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So this is the simplified manner we should restore is in this matter.



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This is simplified to v Okay now how to simplify affection.



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So it is very easy to simplify affection but we all know to do is.



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So what is our desired result is very simple F1 begins 70 by eight.



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Now I want to simplify this function so our zone should be thirty five by four.



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So it is very easy to simplify inflection but we all know to do is find the GC Of these two terms.



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This really means high used commando either to find you silly you should be will come out to be do and



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after finding that you should be dividing numerator and divide denominator so numerator will become



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numerator divided by GC and denominator will become denominator Baiji City.



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Now how to conclude your city for example you want to calculate the city of two numbers four and twenty.



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So what can be the maximum value of the city to the maximum value of the city can before.



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OK maximum leave the city can before you study is the highest common device and a number which will



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divide both the number four and 20 we have to find a number we have to find the highest number which



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divides both the number four and 20 so the highest value of the city can be 4.



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Okay so what we will do will start dividing from 1 then we will divide from 2 and so on then the minimum



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of two numbers A and B for example and better two numbers.



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Would you today want to find so I would start from one.



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Tell me now if a and b and I will divide I will divide I will write or divide both in number and B by



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these numbers and the mixing of these numbers will be out decently Okay so let's in gold so let's create



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a function simplify so we have a function why to simplify



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so what it will take it will not take any argument.



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Why.



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Because I will call this function and object will call this function object dot simplify.



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So no object will be sought in this keyword and with the help of this keyword we can access it properties.



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So initially let's say G 30 is when and the maximum value of the city can be so g city maximum live



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the city can be minimum of numerator and denominator so this add on numerator



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this adult denominator.



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So using this is optional here



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optional why optional.



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Because implicitly the intimate term means this ADD or denominator so optional.



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Okay.



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So the object that will call this function that objectively restored in this keyword and with the help



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of this keyword we will be able to access the properties so we will start dividing from one and we will



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go below.



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J J is the maximum you should devalue



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so try to divide numerator and denominator by G.



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So if numerator



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more i equals equals zero and denominator more i equals equals zero.



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That means I use a common factor of a and in the middle.



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So we will update disagree.



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So you suis I



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after calculating the city we have to simplify the function so simplify so for simplifying what we can



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do.



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We will update the numerator and denominator so numerator is numerator divided by DCD and similarly



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denominator is the United divided by DCD.



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Okay now we call this function simplify.



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So after that add a function our result has been updated the result has been stored in F1 software starting.



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That is our day in F1.



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We will call the simplify function so simplify not just simplify function will simplify F1.



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Now see here how we used to call a function how we used to call a function we used to call a function



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something like this object but function name object named dart function name.



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Okay but here I simply here I simply write only function name so how it will work.



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Basically basically what we're doing here.



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F1 dot and F2.



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So F1 is stored in this keyword of the add function.



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So we are in the end function.



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So in their function simplify implicitly means this add to simplify OK implicitly simplify this line



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simply means this error simplify and this contains F1 OK.



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This contains F1 so F1 will be stored in the F1 will be stored in this keyword or the simpler way function.



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So here this Gaillard will stored F1 OK so similarly here it is optional to write this at an imitator



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because implicitly it means this also admits this only OK.



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Now let us try to create an object and let's see where that our code is working or not.



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So function



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F1 let's see the numerator is uh what we decided then and also numerator used to be 90 days to certain



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number of days in the Middle East.



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And I'd say we have one more faction F2 so what was the name attended to 15 and food.



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Now let us call our function F1 not ad and we really bus F to now after that Asian let's spend the value



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of f1 enough to show F1 dart bent



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and after Dortmund



248

00:20:43,920 --> 00:20:48,780

OK let's run this file so a numerator.



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Something wrong here.



250

00:20:59,220 --> 00:21:00,510

So what did I do wrong.



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00:21:02,000 --> 00:21:03,500

Numerator does not name or type



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00:21:09,740 --> 00:21:11,570

numerator does not name type



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00:21:14,640 --> 00:21:14,870

O



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00:21:18,460 --> 00:21:19,350

silly mistake



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okay let's give n line you so f in the bank statement after bringing the numerator and denominator let



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us give a line



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C so the numerator so that one is thirty five by four f one is stratified therefore and have to is fifteen



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by four.



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00:21:50,630 --> 00:21:55,970

So F1 was initially seventy by eight but recall the simplify function so it became thirty five by four



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and F2 remains unchanged it was fifteen by four and after the addition function it is fifteen by four



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only.



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00:22:03,050 --> 00:22:11,280

Okay so I will call it is working now I want to just for extra information we also have a function we



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also have an inbuilt function to convert DCT so then both function work calculating use it is very simple



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so let's come and get out.



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So in build function and build function for GC



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So this is underscore underscore GST and give the two values a and b for example and B are the two numbers



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who you really we want to find so



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00:22:45,300 --> 00:22:46,200

how can we use this.



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00:22:46,230 --> 00:22:51,810

So end a let's say in C C will contain the GST off to numbers.



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So we you see the overall numbers E and B.



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00:22:55,080 --> 00:22:59,900

Okay so this is evident world function and that's going to scold you silly it is that embed function



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so we can directly use this or we can use it in this function or we can find we can call registry indecision



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okay it is our choice Okay so that's all for this video thank you.