====== ATAN ======

{{:en:mervis-ide:35-help:atan.png}}

===== Function name =====

ATAN

===== ST call =====

<code st-iec>
PROGRAM ATAN_DEMO
  VAR
     REAL1,REAL2: REAL;
  END_VAR
 REAL2:= ATAN(IN:=REAL1);
END_PROGRAM
</code>

===== Description =====

Returns value of the inverse function to tangent function.

===== Inputs =====

|Input|Type    |Description|
|IN   |ANY_REAL|Input value|

===== Outputs =====

|Output|Type    |Description           |
|=>    |ANY_REAL|Output value (in rads)|

===== Application example =====

{{:en:mervis-ide:35-help:atan_example.png}}