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man pages section 3: Extended Library Functions, Volume 2

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Updated: Thursday, June 13, 2019
 
 

erfcf(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(7) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Interface Stability
Committed
Availability
system/library/math
MT-Level
MT-Safe
Standard

See Also

math.h(3HEAD), erf(3M), isnan(3M), attributes(7), standards(7)