input: Write a function to search for a given character in a specified string. If the character is found in the string, return True; otherwise, return False.
  assert serach_char("Hello", 'l')==True
  assert serach_char("World", 'a')==False
  assert serach_char("Python", 'P')==True
  assert serach_char("Function", 'z')==False
  assert serach_char("", 'a')==False
output: def search_char(s, char):
      return char in s