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Hello.

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Welcome back.

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In this lesson we're going to look at loops in Python.

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So this our last project or do its names.

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It's named conditions and loops.

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We didn't explode loops and now so I'm adding this other lesson for us to see loops.

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So I'm going to come over here.

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New file and I'm going to call this loops by pressing control is to save and I call this number five

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on this call loops.

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And once that is done I can close this old one.

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So python like any other programming language uses the for loop and the while one loop all the while

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loop for loops can iterate very a given sequence and this young example we can say this time let's add

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some comments to print out these simple examples we shall print in the end so I'll put a header here

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I'll put a comment which I'll call.

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Example 1

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and this example shall we just print one through 8 like this.

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Let's just put this here printing simple one resort.

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This will make our output much more clearer.

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Print example.

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Right.

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So now let's say we have a list of numbers.

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I'm just going to have a variable here numbers.

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And this is a list and it's going to be a list contained in 0 1 2 3 4 5 6 7 8.

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Like this we've got a call mohair so we have these numbers.

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So to look through this list we can just do four.

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And then we have to create an iterator we use num here some as an integrator.

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What is this.

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It's rates are going to loop or look through.

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So we're going to say for num in numbers like this.

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So we're going to use this iterator to loop through this one here.

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Once that is done we can see print.

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Now

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so this one is going to go through 0 1 2 3 4 5 6 7 8.

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OK.

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Let's print and see.

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I'm just going to click over here to run module.

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OK.

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To save that I can see.

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Example one resorts to a one two three four five six seven eight.

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Right.

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So with lubed through the sequence very simply also we can use the for loop to iterate or loop through

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a range.

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Let's what I mean.

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So over here I'll just say example to put a comment here for a revision a sample to print the numbers

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0 1 2 3 4.

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So I can just come in and say print

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sample to resorts.

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Right.

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Let's get to the actual code so we can see for x in range 5.

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We can just use the word range here and pass the documents five.

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And basically this means from zero through four So five is not included.

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Right.

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If we say range six six is not included is anything below six range 10 means the same thing zero through

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nine range 20 zero through 19.

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So for x in range five we can just say we have to put code on here we can just say print x and let's

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do that and see what we've got or save by press and control and X and click over here to run the module

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you can see we've got serial One two three four right let's see on that example so rather than just

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print the range we can actually select certain numbers in the range that should be printed.

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Let's see this example just copy this to prevent the typing noise put over here and I'll see.

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Example three this time we're going to print Hubble would print 3 4 5 less print 3 4 5

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we're going to print from 3 through 5 like this.

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So we can just come here and see for x in range this time we'll can pass two argument three comma six

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right.

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Then we can see we put a semicolon her and then we can see print x let's just spaced this out a bit.

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So this is a sample number three resort to our click over here to run hits enter to save.

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Now you can see we have 3 4 5 printed here just like we passed over here 3 4 5 and this has got nothing

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to do with the list really range just provides the numbers for us so it's print an X in this range three

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four five without a six.

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Right.

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So let's see on that example.

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And it doesn't have to be completely sequential.

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Sometimes we can jump over sets in numbers in the sequence.

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Let's do example for this time we're going to print something like 3 5 7 and we're going to use range

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in a different way.

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Copy this.

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Then I'll bring it down.

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This is just to make our printouts look good.

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And this one is going to bring 3 5 7 and this is going to be Example number 4.

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So to do that we can just come here and see 4 x 4 x in range.

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This time we can pass three arguments.

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We can pass three eight and then two.

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So this is going to be the step size is going to print three and then jump two steps.

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Bring the other number in then jump two steps.

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Bring the other number.

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So we see print within this range.

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This is the lower boundary.

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This the upper boundary.

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And this should be the steps rather than go three four five six seven.

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Go three jump two steps which will give us five.

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And then when you reach five jump another two steps which would give us seven.

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Then you print.

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Let's see what I mean.

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So I put a semicolon here and then I'll say print x like this.

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And this is example for.

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So let's observe for example for print control as to save click over here to run the module and we have

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three four five three five seven.

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Just like we stated here.

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So we'll use this as the steps.

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This is the range.

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Three three through eight and then we use to us this step size right.