Last time we used for (let i = 0; i < 3; i++) but didn't do much with the variable i itself. That variable is called the loop counter, and it holds useful information!

Engagement Message

What do you think the variable i represents in each round of the loop?

In for (let i = 0; i < 3; i++), the variable i takes on the values 0, then 1, then 2. We can use this variable inside our loop to create different behavior each time.

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If we used for (let i = 0; i < 5; i++), what would be the last value that i holds inside the loop?

Here's how we can use the loop variable:

This prints "This is round number 1", then 2, 3, and 4.

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What would be printed on the third time through this loop?

The loop counter is especially helpful when working with arrays. We can use it to access specific index positions: