g0201_0300.s0231_power_of_two

Class Solution

java.lang.Object

g0201_0300.s0231_power_of_two.Solution

public class Solution
extends 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 and Description
Solution()

Method Summary

Modifier and Type	Method and Description
boolean	isPowerOfTwo(int n)

Methods inherited from class java.lang.Object

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

Constructor Detail

Solution

public Solution()

Method Detail

isPowerOfTwo

public boolean isPowerOfTwo(int n)