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IsNumber
Syntax
IsNumber(E:OBJECT):BOOL
Summary
checks if the argument is a number
Description
This function returns TRUE if E has type INT, RAT, or ZMOD.
Otherwise, it returns FALSE.

Example

Use R ::= Q[x,y];
IsNumber(x+y);
FALSE
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IsNumber(3);
TRUE
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IsNumber(3%5);
TRUE
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