Check number is binary or not in python by R4R Team

Binary number

-It is a number which expressed in the base-2 numeral system,
-Binary numbers are 0 or 1.

Program to check the input number is binary or not-

n=int(input("Enter binary numbern"))

def check(n):
while(n):
if n%10==1 or n%10==0:
pass
else:
return 0
n=int(n/10)
return 1

if check(n):
print("Yes it is binary number")
else:
print("It is not binary number")

Enter binary number
1001
Yes it is binary number

Enter binary number
121
It is not binary number