Number of 1 Bits

Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as the ).

For example, the 32-bit integer ’11' has binary representation 00000000000000000000000000001011, so the function should return 3.

 

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/** * @param {number} n - a positive integer * @return {number} */var hammingWeight = function(n) {    var res = 0;    for (i = n; i !== 0; ){        if(i % 2 === 1){            res++;        }        i = parseInt(i / 2);    }    return res;};