input: Write a function to determine if a given string contains any numbers. If the string contains at least one number, return True; otherwise, return False.
  assert string_contains_number('hello123')==True
  assert string_contains_number('abc')==False
  assert string_contains_number('1a2b3c')==True
  assert string_contains_number('')==False
  assert string_contains_number('Number9')==True
output: def string_contains_number(s):
      return any(char.isdigit() for char in s)