Content-type: text/html Man page of nan

nan

Section: Mathematical Library Functions (3M)
Updated: 12 Jul 2006
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NAME

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 TYPEATTRIBUTE VALUE
Interface StabilityStandard
MT-LevelMT-Safe

 

SEE ALSO

math.h(3HEAD), strtod(3C), attributes(5), standards(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUES
ERRORS
ATTRIBUTES
SEE ALSO

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Time: 02:39:32 GMT, October 02, 2010