Package g0201_0300.s0231_power_of_two

Class Solution

java.lang.Object
g0201_0300.s0231_power_of_two.Solution
public class Solution extends java.lang.Object
231 - Power of Two.

Easy

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

Example 4:

Input: n = 4

Output: true

Example 5:

Input: n = 5

Output: false

Constraints:

  • -231 <= n <= 231 - 1

Follow up: Could you solve it without loops/recursion?

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    isPowerOfTwo(int n)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • isPowerOfTwo

      public boolean isPowerOfTwo(int n)