erfc(3M) Mathematical Library Functions erfc(3M)
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 TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
erf(3M), isnan(3M), math.h(3HEAD), attributes(5), standards(5)
SunOS 5.11 12 Jul 2006 erfc(3M)
