CODEWITHSUNDEEP
javascript
tjsims8819
tjsims8819

Reputation: 61

My code does not work with forEach method

I want to know why forEach would not work on this array but map does work.

I tried to use .map and it works but shouldn't forEach work as well

function letters() {
  let string = "abcd";

  let newString = string.split("").forEach(i => {
    return String.fromCharCode(i.charCodeAt(0) + 1);
  });

newString = newString.join("");

}

I get undefined when I use forEach

Upvotes: 1

Views: 32

Answers (2)

ansonws
ansonws

Reputation: 88

If you want to use forEach:

function letters() {
  let string = "abcd";

  let newString = '';
  string.split("").forEach(i => {
    newString += String.fromCharCode(i.charCodeAt(0) + 1);
  });

  return newString;

}

Upvotes: 0

Barmar
Barmar

Reputation: 780798

shouldn't forEach work as well

No, it shouldn't. The documentation says:

Return value
undefined

This is the difference between map and forEach. They both call the function for each element of the array. map returns a new array containing the results, forEach ignores the results and doesn't return anything.

Upvotes: 1

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