WEBVTT

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When you use a repeat block to loop your code
how does the computer know when it's repeated

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enough times? The repeat block is actually
hiding a more sophisticated piece of code

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called a for loop which counts from a starting
value up to an ending value by a specific

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increment. For example, a repeat 3 block counts
from 1 to 3 by 1. Every time it counts, it

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runs the code inside the loop. The for loop
knows how many times it has run by using a

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counter variable that is set to the starting
value at the beginning of the loop and has

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the increment added to it each time the loop
is run. As soon as the counter variable is

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greater than the ending value the loop stops
running. The benefit of using a real for loop

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instead of the repeat block is that you can
actually see the counter variable and use

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it in your loop.