191-Number-Of-1-Bits.kt

package kotlin

class Solution {
    // you need treat n as an unsigned value
    fun hammingWeight(n:Int):Int {
        
        var n = n 
        var count = 0
        for(i in 0..31){
            if( n and 1 == 1) count++
            n = n shr 1
        }
        
        return count
    }
}