Content-type: text/html Man page of erfc

erfc

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

erfc, erfcf, erfcl - complementary error function  

SYNOPSIS

c99 [ flag... ] file... -lm [ library... ]
#include <math.h>

double erfc(double x);

float erfcf(float x);

long double erfcl(long double x);  

DESCRIPTION

These function compute the complementary error function 1.0 - erf(x).  

RETURN VALUES

Upon successful completion, these functions return the value of the complementary error function.

If x is NaN, a NaN is returned.

If x is ±0, +1 is returned.

If x is -Inf, +2 is returned.

If x is +Inf, 0 is returned.  

ERRORS

No errors are defined.  

USAGE

The erfc() function is provided because of the extreme loss of relative accuracy if erf(x) is called for large x and the result subtracted from 1.0.  

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPEATTRIBUTE VALUE
Interface StabilityStandard
MT-LevelMT-Safe

 

SEE ALSO

erf(3M), isnan(3M), math.h(3HEAD), attributes(5), standards(5)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUES
ERRORS
USAGE
ATTRIBUTES
SEE ALSO

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