342. Power of Four.java

class Solution {
    public boolean isPowerOfFour(int n) {
        while(n>1){
            if(n%4==0){
                n=n/4;
            }
            else{
                break;
            }
        }
        if(n==1){
            return true;
        }
          
        else{
            return false;
        }
    }
}