Erlang (programming language)/Tutorials/Hello: Difference between revisions
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imported>Eric Evers (New page: =Hello World (serial)= ==Code Example== -module(hello). -export([start/0]). start() -> io:format("Hello, world!\n"). ==Analysis of the example== The Hello World program (se...) |
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=Hello World (serial)= | =Hello World (serial)= | ||
==Code Example== | ==Code Example== | ||
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==Analysis of the example== | ==Analysis of the example== | ||
The [[Hello World]] program (see above) appears in many programming languages books and articles as a cursory introduction into a language's [[syntax]]. The first hello world program was introduced in the book ''The C Programming Language'' | The [[Hello World]] program (see above) appears in many programming languages books and articles as a cursory introduction into a language's [[syntax]]. The first hello world program was introduced in the book ''The C Programming Language''. | ||
<code>-module(hello)</code> tells the [[compiler]] to create a new module(library) called hello. The code tells us the file name for this code: hello.erl. | <code>-module(hello)</code> tells the [[compiler]] to create a new module(library) called hello. The code tells us the file name for this code: hello.erl. | ||
Latest revision as of 08:34, 5 May 2024
Hello World (serial)
Code Example
-module(hello).
-export([start/0]).
start() ->
io:format("Hello, world!\n").
Analysis of the example
The Hello World program (see above) appears in many programming languages books and articles as a cursory introduction into a language's syntax. The first hello world program was introduced in the book The C Programming Language.
-module(hello) tells the compiler to create a new module(library) called hello. The code tells us the file name for this code: hello.erl.
-export([start/0]). exports a function named start with 0 arguments to the world outside of this module called hello.
start() -> tells the compiler that there is a function named start() with no arguments.
io:format("Hello, world!\n"). will make the program output Hello, world! and a new line (\n) on the screen.