input: Write a function to search for a character in a given string.
  
  
  def search_char(input_str, char):
      for c in input_str:
          if c == 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
  assert search_char("Python", 'P')==True
output: def search_char(input_str, char):
      for c in input_str:
          if c == char:
              return True
      return False