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In this guide, we will discuss Erlang atan. The method returns the arctangent of the specified value.

Syntax

atan(X)

Parameters

X – A value is specified for the arctangent function.

Return Value

The return value is a float value representing the arctangent value.

For example

-module(helloworld). 
-import(math,[atan/1]). 
-export([start/0]). 

start() ->
   Atan = atan(0.7071), 
   io:fwrite("~p~n",[Atan]).

Output

When we run the above program, we will get the following result.

0.6154751878649041

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