WEBVTT

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Welcome back.

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In this video we're going to learn about the for loops.

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A for loop is used for iterating over a sequence that is either a list, a tuple, a dictionary, a

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set, or a string.

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Use for loops to repeat an action for each item in the sequence.

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For example, if we need to print numbers from 1 to 5, five is included.

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We use something called range and the for loop.

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For I.

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The index in range 1 to 6 six is not included.

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Range includes one and two, three, four, and five.

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For every time go increase I by one and print number I.

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So here we are having the formatted string.

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We are placing I with its value in each iteration and each iteration it increases I by one.

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Let me run the cell and here we go.

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Number one, number 2345.

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And here is the output.

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So this is the for loop in Python.

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For I in range 1 to 6, go and print this statement.

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Another loop.

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Using a list of names we have names list Alice, Bob, Charlie for name for each name in names.

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This is the meaning for each name in names.

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Go and print hello message and place the name of the current iteration.

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Run this cell and here we go.

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Hello, Alice.

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Hello, Bob.

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Hello, Charlie.

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Also, we can use the for loop with strings.

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So for x in Alice print X, run the cell and here we go a l I c.

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Every character inside this string will be printed in a new line.

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So here we can iterate over strings.

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Even strings are iterable objects.

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They contain a sequence of characters.

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Okay, so this is the usage of the for loop.

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There is something interesting in for loops, we can break the loop and the iterations if we satisfy

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a condition.

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For example, if I want to stop this, iterate this loop and iterations on Bob, what we need to do

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we can use here.

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If name equals to Bob, then go and break with break statement.

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We can stop the loop before it has looped through all the items.

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Let me run and you can see we are not.

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We are not executing all the iterations.

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Alice, Bob, Charlie.

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When the loop gets into Bob and reaches Bob, it break and stops the iteration.

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Okay, so this is the power of using break, and we can use it in certain conditions if they are satisfied

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in many ways and in many examples.

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Okay.

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So this is a very important thing in order to control and stop the loop if you reach a specific condition.