Erlang Tutorial

Erlang atan method

This method returns the arctangent value of the specified value.

atan(X)

X-Specify a value for the arctangent function.

The return value is a floating-point value representing the arctangent value.

Example

-module(helloworld).　
-import(math,[atan/1]　
-export([start/).　
start()　->
　　　Atan = atan(0.7071,　
　　　io:fwrite("~p~n",[Atan]).

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

0.6154751878649041