Advertisement
Not a member of Pastebin yet?
Sign Up,
it unlocks many cool features!
- def prog(st):
- if st=="":
- return False
- elif st[0]=="0":
- return False
- for i in range(len(st)):
- if st[i] in ("1234567890"):
- return True
- else:
- return False
- print(prog("abc1"))
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement