isNaN
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isNaN

STD.Math.isNaN( val);

valThe value to test
Return:Returns a BOOLEAN indicating whether a real value is a NaN (not a number) value.

The isNaN function returns whether a real value is a NaN (not a number) value.

Example:

IMPORT STD;
a := STD.Math.NaN ;
b := 42.1;
STD.Math.isNaN(a); //true
STD.Math.isNaN(b); //false

See Also: NaN, isFinite

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