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OpenDarwin 7.2.1 - man page for nan (opendarwin section 3)

NAN(3)				   BSD Library Functions Manual 			   NAN(3)

NAME
     nan -- generate a quiet NaN

SYNOPSIS
     #include <math.h>

     double
     nan(const char *tagp);

     float
     nanf(const char *tagp);

DESCRIPTION
     The nan() and nanf() functions return a quiet NaN. The character string tagp is converted to
     an integer, which is clipped to the range 0 to 255, inclusive. This value is used as the NaN
     code. The NaN code is placed in the 8th through 15th most significant bits of the fraction
     field of the resulting NaN.

SPECIAL VALUES
     If tagp is empty, 0 is used for the NaN code.

STANDARDS
     The nan() and nanf functions conform to ISO/IEC 9899:1999(E).

BSD					  July 24, 2003 				      BSD


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