ATANH

Returns a DOUBLE PRECISION value that represents the inverse hyperbolic tangent of the function argument.

Returns a DOUBLE PRECISION value that represents the inverse hyperbolic tangent of the function argument.

Behavior type

Immutable

Syntax

ATANH ( expression )

Arguments

expression
Resolves to a value of type INTEGER or DOUBLE PRECISION between -1.0 and +1.0, inclusive, otherwise returns NaN.

Examples

=> SELECT atanh(-0.875);
       atanh
-------------------
 -1.35402510055111
(1 row)