# How to get number of bits set to 1 of a binary number?

## Algorithm problem:

Write a function given 2 non-negative integers a and b returns number of bits set to 1 in the binary representation of number a*b

## Solution

Following is the solution of the above problem using JavaScript:

function getCountSetBits(num) { let count = 0; while (num) { count += num & 1; num >>= 1; } return count; } function solution(A, B) { if (A < 0 || A > 100000000) return 0; if (B < 0 || B > 100000000) return 0; const multiplyResult = A * B; return getCountSetBits(multiplyResult); } console.log(solution(5, 25));