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Remove leading and trailing spaces from a string.
 
LTRIM$(stringexpression$)
RTRIM$(stringexpression$)
 
    ■ stringexpression$    Any string expression.
 
Example:
    a$ = "    Basic    "
    PRINT "*" + a$ + "*"            'Output is:  *    Basic    *
    PRINT "*" + LTRIM$(a$) + "*"    'Output is:  *Basic    *
    PRINT "*" + RTRIM$(a$) + "*"    'Output is:  *    Basic*