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CHECKNUM Details (↑ Choosing Run-time Behavior)
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Specifying this directive causes extra code to be generated to ensure
that numeric fields contain valid data before any operations are
performed on them. With CHECKNUM set, run-time error message 163
(Illegal charcacter in numeric field (fatal)) is displayed if any
numeric field is found to contain non-numeric data. This error can be
disabled using the -F RTS switch.
Specifying CHECKNUM causes extra code to be produced, reducing the
efficiency of your programs. For smaller, faster code you should not
specify CHECKNUM.
See also ◄-F RTS switch►
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