def upper(word: str) -> str:
 """
 Will convert the entire string to uppercase letters

 >>> upper("wow")
 'WOW'
 >>> upper("Hello")
 'HELLO'
 >>> upper("WHAT")
 'WHAT'

 >>> upper("wh[]32")
 'WH[]32'
 """

 # converting to ascii value int value and checking to see if char is a lower letter
 # if it is a capital letter it is getting shift by 32 which makes it a capital case
 # letter
 return "".join(
 chr(ord(char) - 32) if 97 <= ord(char) <= 122 else char for char in word
 )


if __name__ == "__main__":
 from doctest import testmod

 testmod()