Erlang - whereis

It is called as whereis(Name). Returns the pid of the process that is registered with the name.

Syntax

whereis(atom,pid)

Parameters

• atom − This is the registered name to give to the process.

Return Value

The process id bound to the atom.

For example

-module(helloworld). 
-export([start/0, call/2]). 

call(Arg1, Arg2) -> 
   io:fwrite("~p~n",[Arg1]). 

start() -> 
   Pid = spawn(?MODULE, call, ["hello", "process"]), 
   register(myprocess, Pid), 
   io:fwrite("~p~n",[whereis(myprocess)]).

Output

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

<0.55.0>
"hello"