Given an integer n, return true if it is a power of two. Otherwise, return false.
An integer n is a power of two, if there exists an integer x such that n == 2x.
Example 1:
Input: n = 1 Output: true Explanation: 20 = 1
Example 2:
Input: n = 16 Output: true Explanation: 24 = 16
Example 3:
Input: n = 3 Output: false
Constraints:
-231 <= n <= 231 - 1
class Solution {
public boolean isPowerOfTwo(int x) {
if(x==0){
return false;
}
while(x%2==0){
x = x/2 ;
}
if(x==1){
return true ;
}else{
return false;
}
}
}
def is_power_of_two(n):
if n <= 0:
return False
return (n & (n - 1)) == 0
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