Beginner

Hello World in Java

Every programming journey starts with Hello World. Let’s write our first Java program.

The Code

Create a file named HelloWorld.java:

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public class HelloWorld {
    public static …

Hello World in Erlang

Every programming journey starts with Hello World. Let’s write our first Erlang program and explore what makes this concurrent functional language tick.

The Code

Create a file named hello.erl: …

Hello World in OCaml

Every programming journey starts with Hello World. Let’s write our first OCaml program and explore what makes this functional language special.

The Code

Create a file named hello.ml:

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Hello World in Haskell

Every programming journey starts with Hello World. Let’s write our first Haskell program using GHC (Glasgow Haskell Compiler), the standard Haskell implementation.

The Code

Create a file named …

Hello World in Eiffel

Every programming journey starts with Hello World. Let’s write our first Eiffel program using EiffelStudio, the primary Eiffel development environment.

The Code

Create a file named hello.e: …

Hello World in Delphi

Every programming journey starts with Hello World. Let’s write our first Delphi program using Free Pascal’s Delphi compatibility mode.

The Code

Create a file named hello.dpr:

program …

Hello World in Ruby

Every programming journey starts with Hello World. Ruby makes this delightfully simple—it’s just one line that reads almost like English.

The Code

Create a file named hello.rb:

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puts …