23. Check If a Number Is a Power of Two

Write a function to check if a given positive integer is a power of 2. Do not use loops, multiplication, division, or library functions.
You must solve it using bitwise logic only.

Example-1

Input:  n = 8  
Output: YES

Example-2

Input:  n = 7  
Output: NO

Example-3

Input:  n = 1  
Output: YES