342. Power of Four

发布时间：2020-12-14 04:39:19 所属栏目：大数据来源：网络整理

导读：Given an integer (signed 32 bits),write a function to check whether it is a power of 4. Example 1: Input: 16Output: true Example 2: Input: 5Output: false class Solution { public boolean isPowerOfFour( int num) { return Math.log10(num) / Ma

Given an integer (signed 32 bits),write a function to check whether it is a power of 4.

Example 1:

Input: 16
Output: true

Example 2:

Input: 5
Output: false

class Solution {
    public boolean isPowerOfFour(int num) {
         return Math.log10(num) / Math.log10(4) % 1 == 0; 
    }
}

（编辑：李大同）

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