const numbers = [1, 2, 3, 4];
const squared = numbers.map(num => num * num);
console.log(squared);

let x = 10;
function foo() {
  console.log(x);
  let x = 20;
}
foo();

let arr = [1, 2, 3];
arr.length = 0;
console.log(arr);

let a = {};
let b = { key: "b" };
let c = { key: "c" };

a[b] = 123;
a[c] = 456;

console.log(a[b]);

console.log((true + false) > (2 + true));

Kiritish: nums = [0,1,0,3,12]
Natija: [1, 3, 12, 0, 0]