When should I use map vs forEach in JavaScript?

Can you explain the difference between map and forEach in JavaScript?

Sure! Both map and forEach are array methods, but they serve different purposes. map creates a new array by applying a function to each element, while forEach executes a function on each element without returning a new array.

When should I use map instead of forEach?

You should use map when you need to transform the elements of an array and create a new array from those transformations. Use forEach when you just want to perform an action for each element without needing a new array.

Can you give me an example of using map?

Of course! For example, if you have an array of numbers and you want to double each number, you can use map like this: const doubled = numbers.map(num => num * 2); This will return a new array with the doubled values.

What about forEach? Can you show me that?

Certainly! If you want to log each number to the console, you can use forEach like this: numbers.forEach(num => console.log(num)); This will print each number without creating a new array.