Given an integer (signed 32 bits), write a function to check whether it is a power of 4.
Example:
Given num = 16, return true. Given num = 5, return false.
Follow up: Could you solve it without loops/recursion?
/**
* @param {number} num
* @return {boolean}
*/
var isPowerOfFour = function(num) {
if (((Math.log(num)/Math.log(4))%1)===0)
return true;
else
return false;
};
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本文标题：342. Power of Four
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