TheAlgorithms-Python

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def lower(word: str) -> str:
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    """
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    Will convert the entire string to lowercase letters
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    >>> lower("wow")
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    'wow'
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    >>> lower("HellZo")
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    'hellzo'
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    >>> lower("WHAT")
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    'what'
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    >>> lower("wh[]32")
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    'wh[]32'
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    >>> lower("whAT")
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    'what'
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    """
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    # Converting to ASCII value, obtaining the integer representation
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    # and checking to see if the character is a capital letter.
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    # If it is a capital letter, it is shifted by 32, making it a lowercase letter.
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    return "".join(chr(ord(char) + 32) if "A" <= char <= "Z" else char for char in word)
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if __name__ == "__main__":
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    from doctest import testmod
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    testmod()
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