8.Power of 2.cpp

/*
Given an integer, write a function to determine if it is a power of two.

Example 1:

Input: 1
Output: true
Explanation: 20 = 1
Example 2:

Input: 16
Output: true
Explanation: 24 = 16

*/

class Solution {
public:
    bool isPowerOfTwo(int n) {
       long long int i=1;
        while(i<n)
            i*=2;
        if(i==n)
            return true;
        else
            return false;
    }
};