input: Write a function to search for a character in a given string. If the character is found in the string, return True, otherwise return False. If the input string is empty, return False.
  
  def search_char(input_str, char):
    for current_char in input_str:
      if current_char == 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("", 'a') == False
output: def search_char(input_str, char):
    for current_char in input_str:
      if current_char == char:
        return True
    return False