Erlang Atoms (Atom)

An atom is a literal, a named constant. If an atom does not start with a lowercase letter, or contains alphanumeric characters, underscores (_) or @, it should be enclosed in single quotes (').

This program is an example of how to use atoms in Erlang. The program declares3atoms, respectively atom1，atom_1and 'atom 1Thus, you can see the different methods for declaring atoms.

Online Example

-module(helloworld).　
-export([start/0]).　
start()　->　
　　　io:fwrite(atom1),　
　　　io:fwrite("~n"),　
　　　io:fwrite(atom_1),　
　　　io:fwrite("~n"),　
　　　io:fwrite('atom　1'),　
　　　io:fwrite("~n").

The output of the above program is as follows:

atom1
atom_1
atom　1

Let's take a look at some methods available in Erlang for atoms.