# ERFC

Elemental Intrinsic Function (Generic): Returns the complementary error function of an argument.

result = ERFC (x)

x | (Input) Must be of type real.

## Results

The result type and kind are the same as x. The result is in the range 0 to 2.

ERFC returns 1 - ERF(x) and is defined as follows:

ERFC is provided because of the extreme loss of relative accuracy if ERF(x) is called for large x and the result is subtracted from 1.

Specific Name | Argument Type | Result Type
--- | --- | ---
ERFC | REAL(4) | REAL(4)
DERFC | REAL(8) | REAL(8)
QERFC | REAL(16) | REAL(16)

## Example

ERFC (1.0) has the value 0.1572992057.

Parent topic: E to F

## See Also

ERF