Given a number n. Return true if that is a power of 2.

index.js

/**
 * check if N is a power of 2
 * e.g, if N=8, then N is 2^3
 */

const isPowerOfTwo = (num) => {
// 	odd number can never be a power of two
    if (num % 2 !== 0) return false;
    let quotient = 0;
    let chunks = [];
    while (quotient !== 1) {
// 			quotient = 16 / 2 = 8
        quotient = num / 2;
// 			if quotient is not even, overruling 1
        if (quotient % 2 !== 0 && quotient !== 1) return false;
        chunks.push(2);
        num = quotient;
    }
// 	lenght of chunks is the power of num
    return chunks.length;
};

const power = isPowerOfTwo(64);
if (power) {
    console.log("Given number is 2^" + power);
} else {
    console.log("Number can't be raised to power of 2");
}