Atan

Parameters
x real

A value between -1 and 1.

comment

Arctangen, one of the inverse trigonometric functions. The result is returned in radians in range [-π/2, π/2]. Returns 0 for invalid input.

patch

1.00

pure
This function is pure. For the same values passed to it, it will always return the same value.
return type
real
Source code
native Atan     takes real x returns real
Source
common.j
wc3modding.com
Atan