Platform

x64, Win32, .NET

Purpose

To get the Arctangent (inverse tangent) of the argument.

Class

Elemental function.

Syntax

REAL FUNCTION ATAN(X)
REAL X
COMPLEX FUNCTION ATAN(X)
COMPLEX X

Description

For REAL X, X can be any real value.

Return value

The real part of the result is given in radians in the range - p/2 < result < p /2.