IsPowerOfTwo

script.js

'use strcit'

/*
 * Calculate if number is power of two. For instance 1, 2, 4, 8, 16, 32, 64, 128, ...
 *
 * @param {Number} n - number > 0
 * @returns {Bool} - true if number is power of two false otherwise
 */
function isPowerOfTwo(n) {
  if (n < 0) {
    return Number.NaN
  } else if (n === 0) {
    return Number.NEGATIVE_INFINITY
  } else if (n === 1 || n === 2) {
    return true
  } else if (n % 2 > 0) {
    return false
  }
  return isPowerOfTwo(n >>> 1)
}

[...Array(100)].forEach((_, i) => (i, console.log(i, isPowerOfTwo(i))))