Error while using map function in javascript

[ghost]

I am trying to use map on an array but getting undefined values.

Here is my code:

let arr = [1,2,3];
let result = arr.map((x) => { x * 2 });

Can someone explain what I am doing wrong?

[mcortezv]

You're missing the return statement. With {}, it doesn't return automatically.

let result = arr.map(x => x * 2);

or

let result = arr.map(x => { return x * 2 });