function insertAtGivenIndexOfAnArray(arr, num, index) {
if(arr.length === 0)
return 0;
for(let i = arr.length - 1; i >= 0; i--) {
arr[i+1] = arr[i];
if(i === index) {
arr[i] = num;
break;
}
}
return arr;
}
console.log(insertAtGivenIndexOfAnArray([23, 45, 56, 7, 99, 10], 11, 3))