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 ALSOerf(3M), isnan(3M), math.h(3HEAD), attributes(5), standards(5)SunOS 5.10 12 Jul 2006 erfc(3M)
