Understanding the differences between `map()` and `forEach()` methods in JavaScript

Question

```
const numbers = [1, 2, 3, 4, 5];

const doubledNumbers1 = numbers.forEach((num) => {
  return num * 2;
});

const doubledNumbers2 = numbers.map((num) => {
  return num * 2;
});
```

Accepted Answer

The variable `doubledNumbers1` contains `undefined` and `doubledNumbers2` contains the array `[2, 4, 6, 8, 10]`.

Answer

Both variables `doubledNumbers1` and `doubledNumbers2` contain the array `[2, 4, 6, 8, 10]`.

Answer

The variable `doubledNumbers1` contains the array `[2, 4, 6, 8, 10]` and `doubledNumbers2` contains `undefined`.

Answer

Both variables `doubledNumbers1` and `doubledNumbers2` contain `undefined`.

Question from the Javascript - Fundamentals test