How can I modify arrays while iterating through them in a loop?

How can I modify arrays while iterating through them in a loop?

You can modify arrays in loops by using methods like forEach, map, or a traditional for loop. What specific modification do you have in mind?

I want to double each number in an array.

You can use the map method for that. Here's an example: const doubled = array.map(num => num * 2); This creates a new array with the doubled values.

What if I want to modify the original array instead?

In that case, you can use a for loop. For example: for (let i = 0; i < array.length; i++) { array[i] *= 2; } This will double each number in the original array.

Are there any pitfalls I should be aware of?

Yes, modifying an array while iterating over it can lead to unexpected behavior, especially if you're removing elements. It's often safer to create a new array.