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