JCL Help:MakeQuietNaN@Double@TNaNTag

 JCL Help: MakeQuietNaN Function

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► JclMath.pas Functions

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Summary

Makes X a quiet NaN.

Pascal

 procedure MakeQuietNaN(var X: Single; Tag: TNaNTag = 0); overload;
procedure MakeQuietNaN(var X: Double; Tag: TNaNTag = 0); overload;
procedure MakeQuietNaN(var X: Extended; Tag: TNaNTag = 0); overload;

Parameters

Parameters	Description
var X: Single	The floating point variable to change into a QNaN.
Tag: TNaNTag = 0	An integer value to be encoded in the resulting NaN value. It may be used to propagate some information through a sequence of arithmetic operations.

Description

Makes a floating point variable X a quiet NaN (QNaN). A QNaN is a NaN with the most significant fraction bit set. QNaNs, in contrast to signaling NaNs (SNaNs), are allowed to propagate through most arithmetic operations without signaling an exception.

See Also

TFloatingPointClass TNaNTag MakeSignalingNaN GetNaNTag

About

Unit

JclMath

Donator

Robert Rossmair

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