map() vs forEach() in JS

map()
The map() method loops through an array
and returns a new array with transformed
elements. It does not modify the original
array.

forEach()
The forEach() method loops through an

array and executes a function on each

element but does not return a new array

Conclusion

• map() returns a new array with modified values.
• forEach() does not return an array, only executes a function.
• Use map() when you need transformed data.
• Use forEach() for side effects like logging or API calls.