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Convert strings to all lowercase or all uppercase letters.
 
LCASE$(stringexpression$)
UCASE$(stringexpression$)
 
    ■ stringexpression$    Any string expression.
 
Example:
    Test$ = "THE string"
    PRINT Test$
    PRINT LCASE$(Test$); " in lowercase"
    PRINT UCASE$(Test$); " IN UPPERCASE"