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Welcome back.

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And this video we are going to check out for loops and they are used to iterate through rangers' arrays,

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collections or anything that provides an iterator.

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And you will learn about iterates arrays, ranges and collections in the future lectures.

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So no worries there.

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But basically, it's just a set of values that are stored in one construct or in one type of data type.

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All right, as we've seen, there are multiple different data types such as and double strings and so

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forth.

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But there are also data types which can store many values at once and their types of collections or

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raters.

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All right, so what we can do is create four loops as well in codling and a for loop is also very similar

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to a wire loop, so we can just go ahead and use to four key words and then number in one dot dot 10

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and execute some code.

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And I'm just going to execute actually got executed in one line.

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Just going to say print number in a string.

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All right.

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So this for loop here, which we have in three lines, so to see is the same thing as our wire loop

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that we had here where we needed to create a variable.

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Then we had the condition, then we did the execution of something or write something on the screen,

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and then we needed to take care of the condition at one point not being met anymore.

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And that's it.

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All right.

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But now we sum everything up, so it's a lot shorter.

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So here it just says for the number which is in this range of one to 10, please execute the code in

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the block.

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And in our case, we just do something simple where we just say, OK, print the number that you're

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currently looking at.

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So if we run this, we can see that it just prints one, two, three four and so forth up to the point

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where it's 10.

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So what a values tent.

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All right.

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So this is just one way of writing a follow up.

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There are other ways as well.

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You can also instead of saying them in so and so you can say I in one until 10.

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So that will pretty much give us the same result where we, for example, just print I and I'm going

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to add an empty space here.

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Let's run this.

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And we can see that printed the one two, three, four, four and so forth from before from this for

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loop.

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And then we have this one empty space to empty space and so forth from this forward.

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So here we just use this until key word.

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What would you say?

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I want to have I in a range.

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So this here is a range where what says start at one and go up until 10, now it goes the other way

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around as well.

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You've seen the key words down to so please.

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Now go ahead and try to build a for loop, which goes from 10 down to one.

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OK.

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I hope you tried it because we just used this keyword already, so I thought it would be a great idea

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to use it in here is a little challenge.

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So for I in 10, down to one.

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All right.

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And I'm just going to say that there should be a line in between so that we see that this is tied down

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to approach here that we had.

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And there we are ten, nine, eight and so forth.

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So what can you do if you want to have steps of not one, but let's say steps of two?

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Well, you can simply add the key word step in here and then say how big the steps should be.

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So down to one with the steps of two who run this, then we will see 10, eight, six four two and nothing

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else.

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That's it.

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So there is another way of writing this what we have here.

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So this down to approach and in general, four to four loops.

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So this is pretty much the same as doing the following as if we had this line here start.

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Step two.

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OK.

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So either you write the form of like this or you can also write the follow up like that where we just

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used a slightly different approach.

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All right.

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But you can, of course, do the same thing for our other four loops up there as well.

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So for the second one where we said I in one until 10, we can also say four I in one dot until 10.

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Internally, the same thing will happen already.

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So these are some examples for for loops.

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We're going to use them extensively, especially as soon as we have collections, lists, arrays and

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all those kind of cool type of collections.

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So see you in the next video.