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SunOS 5.10 - man page for nanf (sunos section 3m)

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

NAME
nan, nanf, nanl - return quiet NaN
SYNOPSIS
cc [ 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 5.10 1 Sep 2002 nan(3M)

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