nanf man page on OpenDarwin

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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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