ATAN(X)

Purpose

Arctangent (inverse tangent) function.

Class

Elemental function

Argument Type and Attributes

X
must be of type real.

Result Type and Attributes

Same as X.

Result Value

Examples

ATAN (1.0) approximates PI/4.


Specific Name Argument Type Result Type Pass As Arg?
ATAN default real default real yes
DATAN double precision real double precision real yes
QATAN (1) REAL(16) REAL(16) yes

Notes:

  1. IBM Extension.

IBM Copyright 2003