input: Write a function to search for a character in a given string. The function should return True if the character is found in the string, otherwise it should return False. If the input string is empty, the function should return False.
  assert search_char("Hello", 'l')==True
  assert search_char("Hello", 'z')==False
  assert search_char("Hello", 'H')==True
  assert search_char("Hello", 'o')==True
  assert search_char("", 'l')==False
output: def search_char(s, char):
      if not s:
          return False
      return char in s