When should I use forEach in JavaScript?

When should I use forEach in JavaScript?

You should use forEach when you want to execute a function on each element of an array without needing to return a new array.

Can you give me an example of using forEach?

Sure! Here's a simple example:

const numbers = [1, 2, 3, 4];
numbers.forEach(num => {
  console.log(num * 2);
});

This will log 2, 4, 6, and 8 to the console.

Are there any performance considerations with forEach?

Yes, forEach can be slower than traditional for loops or other array methods like map, especially for large arrays, because it doesn't allow for early termination.

When should I avoid using forEach?

Avoid using forEach when you need to break out of the loop early or when you need to transform the array, in which case map or a regular for loop might be better.