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Hello.

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Welcome back.

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So in this section we going to give a quick overview of Python programming.

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For those of you who are absolute beginners who have never used Python this is going to be very helpful.

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After going through this section you'll be very familiar with Python and you will be able to complete

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the entire course with no difficulty at all.

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So I'm going to open I do by coming over here and then just type I do and open it and once it is open

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I'm going to create a new file here.

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I'll come in new and once the file is created I'm going to press control as to save and where I'm going

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to say this I'm going to create a new forward her

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operates a new Ford and I'll call this DSP cause and I'll be saving the project here.

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So this is Project 0 I'll call as you underscore and then I'll call a hello like this.

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And once that is done we have this it's created for us.

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So let's start with printing a statement.

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So print is very simple for those of you who are familiar with all the versions of python such as Python

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2 the print function has changed in Python 3 in Python 3.

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The print is a function therefore it requires parentheses whereas in python 2 you could just print without

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adding the parentheses there.

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So overhand Python 3 2 print we say print and then we open brackets like in a normal function and then

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we put quotation marks to indicate it's a string and then we can put something as simple as DSP is everywhere

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like this

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we hit enter and we can add another statement or add another one print.

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And this is going to be a long sentence sine is the always able sine wave sideways.

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I'll say these are the great great grandmother of all signals.

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So I say sign is the great great great grandmother of all signals like this.

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So once we're done if we want to run this we just save by control s or you just click over here if you

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click Run module or press F5 and you've not saved yet.

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You'll be prompted to save.

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So click this I can see it's printed DSP is everywhere.

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Sign is great great great grandmother of all signals and that is true.

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And we create variables over here you don't need to declare variables it would automatically assign

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a variable.

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So I can see V equals twelve W equals eleven and I can say X equals Let's see.

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Zero point zero zero zero zero eight.

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And it will be assigned automatically I don't need to declare it as a float or an integer although that's

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a way we can type cast if we need to.

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Later on you'd see how that is done.

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Also one other thing about Python is it uses indentation blocks.

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Right.

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It uses indentation massively rather than curly braces as used in other programming languages.

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So overhead indentations are actually what separate the entire code.

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So let's see what I mean.

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Let's say we want to use an if statement we could come down here and say if we've got two variables

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fit and w we can use these we can see if V because I can see a W plus one w plus one here like this

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and I put semicolon.

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This is how to write a new statement.

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We're comparing V here to this.

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We're comparing this opera on here to this one.

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We don't need to put a halt in braces.

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It's completely fine this way.

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If I hit enter it's automatically indented over here and I just for a comment here indented for spaces.

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That's the standard indentation in Python.

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You can change this if you want but it's good to keep it this way.

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And after the intent indentation we can add what the the condition execute and I can see print in here

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I can see.

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Statement is true or true.

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Any of your statements is true like this.

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Any of such statements.

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And then once this is done we can click here.

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This time I wouldn't see.

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I'll click here to run and then I'll be prompted to click on.

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Okay to save and run.

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Once that is done it says statement is true.

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So it's automatically indent if I'm to make the mistake and just you know disable or tamper with the

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indentation an error or be thrown.

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So let's see this.

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Yeah.

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So the reason it's working is of course you know I'm tempering with the comment.

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Comments don't matter.

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The compiler does and or D interpreting in the case of Python doesn't care about what you do with a

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comment really.

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So let's say we break the indentation by just doing this to the actual instruction here and let's save

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and then run.

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And you can see expected an indentation block an arrow is thrown to indeed over here indentation is

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everything right.

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So one two three four.

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See one two three four.

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And I'll press control is to save and then click here to run and I can see the statement is true.

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So this is the hello world of Python.

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Very simple very straightforward.

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This is how to print and you always remember this and that you remember indentation as well.

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So this all there is for this very short lesson and I shall see you in the next lesson if you have any

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questions just send me a message or leave it in the questions area.

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I shall see you later.

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Have a good day.