Power of 2 or not
Problem to find the given number is power of 2 (2n) or not.
Example-1:
Input : a = 128 Output : Yes Explain : 27 = 128.
Example-2:
Input : a = 8 Output : Yes Explain : 23 = 8.
Example-2:
Input : a = 6 Output : No Explain : There is no power of two value for 6.
Solution
from itertools import count
a = 128
for i in count(0):
k = 2**i
if(k==a):
print("Yes")
break
elif(k>a):
print("No")
break
Output
Yes