#
Fortran Wiki

erfc

## Description

`erfc(x)`

computes the complementary error function of `x`

, defined as

```
1 - \\text{erf}(x) = 1 - \\frac{2}{\\sqrt{\\pi}} \\int_0^x e^{-t^2} dt.
```

## Standard

Fortran 2008 and later

## Class

Elemental function

## Syntax

`result = erfc(x)`

## Arguments

`x`

- The type shall be `real`

.

## Return value

The return value is of type `real`

and of the same kind as `x`

. It lies in the range `0 \\leq \\mathop{erfc}(x) \\leq 2`

.

## Example

```
program test_erfc
real(8) :: x = 0.17_8
x = erfc(x)
end program test_erfc
```

Revised on September 19, 2010 20:24:51
by

Jason Blevins
(174.101.53.244)
(615 characters / 0.0 pages)