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UPPER(<string>)
returns a string
The result is <string> translated to all uppercase characters.
Example:
say upper('Waldorf') >>> WALDORF
Also see
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A <string> can be translated to lowercase with the following function:
TRANSLATE(<string>, xrange('a', 'z'), xrange('A','Z'))
The function BITOR(<string>) will also translate the alphabetic
characters in <string> to lowercase characters, but it will shift the
ASCII characters between 91 and 95 { [ ] ^ _} to characters 123 through
127.
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