Do you know what will be the output of this code? const arr = [1, 2, 3, 4]; arr.length = 2; console.log(arr);

What happens when you set an array's length?

Do you know what will be the output of this code?

JavaScript

const arr = [1, 2, 3, 4];
arr.length = 2;
console.log(arr);

Show answer and explanation

The answer is [1, 2].

length is writable. Making it smaller removes every item at or above the new length. Setting it to 0 empties the array.