nan(3) - NetBSD Manual Pages

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NAN(3)                  NetBSD Library Functions Manual                 NAN(3)


NAME
nan, nanf, nanl -- return quiet NaN
LIBRARY
Math Library (libm, -lm)
SYNOPSIS
#include <math.h> double nan(const char *tagp); float nanf(const char *tagp); long double nanl(const char *tagp);
DESCRIPTION
The call nan("n-char-sequence") is equivalent to the call strtod("NAN(n- char-sequence)", NULL). The call nan("") is equivalent to the call strtod("NAN()", NULL). The nanf() and nanl() functions are equivalent to nan() but substituting strtof() and strtold(), respectively.
RETURN VALUES
IEEE 754 The nan(), nanf(), and nanl() functions return a quiet NaN as specified by tagp. VAX The nan(), nanf(), and nanl() functions return zero.
SEE ALSO
math(3), strtod(3)
STANDARDS
The nan(), nanf(), and nanl() functions conform to ISO/IEC 9899:1999 (``ISO C99''). NetBSD 9.2 March 15, 2006 NetBSD 9.2
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