Power of Two | LeetCode 231

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Great resource I use to learn algorithms.
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Here is the full implementation.

/**
 * @param {number} n
 * @return {boolean}
 */
let isPowerOfTwo = function(n) {
    if (n < 1) {
        return false;
    }
    
    let powerOfTwo = 1;
    
    while (powerOfTwo < n) {
        powerOfTwo *= 2;
    }
    
    return powerOfTwo === n;
};