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nan(3m) [opensolaris man page]

nan(3M) 						  Mathematical Library Functions						   nan(3M)

nan, nanf, nanl - return quiet NaN SYNOPSIS
c99 [ flag... ] file... -lm [ library... ] #include <math.h> double nan(const char *tagp); float nanf(const char *tagp); long double nanl(const char *tagp); DESCRIPTION
The function call nan("n-char-sequence") is equivalent to: strtod("NAN(n-char-sequence)", (char **) NULL); The function call nan(" ") is equivalent to: strtod("NAN()", (char **) NULL) If tagp does not point to an n-char sequence or an empty string, the function call is equivalent to: strtod("NAN", (char **) NULL) Function calls to nanf() and nanl() are equivalent to the corresponding function calls to strtof() and strtold(). See strtod(3C). RETURN VALUES
These functions return a quiet NaN. ERRORS
No errors are defined. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
math.h(3HEAD), strtod(3C), attributes(5), standards(5) SunOS 5.11 12 Jul 2006 nan(3M)

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