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

NAME
     nnaann - generate a quiet NaN

SYNOPSIS
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     double
     nnaann(const char *tagp);

     long double
     nnaannll(const char *tagp);

     float
     nnaannff(const char *tagp);

DESCRIPTION
     The nnaann() functions return a quiet NaN. The character string tagp is con-
     verted 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.

SSPPEECCIIAALL VVAALLUUEESS
     If tagp is empty, 0 is used for the NaN code.

STANDARDS     The nnaann() functions conform to ISO/IEC 9899:1999(E).

BSD                              July 24, 2003                             BSD