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Here is the "Hello world" program in various programming languages.

Each language is preceded by a very short introduction to that programming language.

The C programming language is still used

The successor, C++, is used for software including systems software and graphics software.

Here is the C code.
#include <stdio.h> int main() { printf("Hello world\n"); return 0; }

Here is the output of the C code.
Hello world

The Java programming language is used to obtain machine independence and runs on many platforms, including Windows, Linux and Apple.

Java is the main language used for Android mobile applications.

Java forces class-based object-oriented programming so that Java programs tend to be more difficult to write and change than with other programming languages.

Here is the Java code.
import java.util.ArrayList; import java.util.List; public class hello_01 { public hello_01() { System.out.print("Hello world\n"); } public static void main(String [] args) { new hello_01(); } }

Here is the output of the Java code.
Hello world

Python is a simple but powerful language used for scripting applications. Due to the large library of Open Source packages, Python is used a lot for machine learning, data science, natural language processing, and many other areas. Note: Python forces indentation rules within the source file, unlike most other programming languages.

For run-time efficiency, Python relies on some packages that are compiled C/C++ code.

Here is the Python code.
print("Hello world")

Here is the output of the Python code.
Hello world

JavaScript started as a scripting language for client-side web pages.

JavaScript has expanded to include server-side and command line programs (e.g., using node.js).

Here is the JavaScript code.
console.log("Hello world\n");

Here is the output of the JavaScript code.
Hello world

Lua is a simple put powerful scripting language written in standard (ANSI) C, so Lua can be embedded in many other programs as a scripting language.

In the computer game industry, Lua is often used by game designers to script actions while the low-level graphics are written in a language such as C++.

Here is the Lua code.
print("Hello world\n")

Here is the output of the Lua code.
Hello world

VBS (Visual Basic Script) is a Microsoft scripting language used for command line scripts (though PowerShell is used in many cases), Office macro programming in VBA (Visual Basic for Applications) - a scripting language based on VBS that has extensions to support Word, Excel, PowerPoint, etc. ASP (Active Server Pages) is a VBS based scripting system for server-side web pages.

Here is the VBScript code.
Option Explicit WScript.Echo "Hello world\n"

Here is the output of the VBScript code.
Hello world\n

PHP is a scripting language for server-side web pages, though it can be used for command line programs.

Here is the PHP code.
<?php printf("Hello world\n"); ?>

Here is the output of the PHP code.
Hello world

Here is the Ruby code.
printf "Hello world\n"

Here is the output of the Ruby code.
Hello world

Ruby is an object-oriented scripting language for server-side web pages, though it can be used for command line programs.

Go is a programming language developed by Google to help solve certain types of problems needed in big data and search engine support, but can be used as a general-purpose programming language.

Here is the Go code.
package main import "fmt" func main() { fmt.Printf("Hello world\n") }

Here is the output of the Go code.
Hello world

Julia is oriented towards numerical computation as found in big data processing, data science applications, machine learning, etc.

Here is the Julia code.
println("Hello world\n");

Here is the output of the Julia code.
Hello world

Scheme is a functional language. Functional languages use a more general declarative approach rather than a command-based imperative approach to programming.

Here is the Scheme code.
(begin (format #t "Hello world\n") )

Here is the output of the Scheme code.
Hello world

I have included languages that I have, to date, automated the running, with or without input, and generating output, during the format of the source document into web page, document, presentation, etc.

I use a macro-formatting process so that I can write the same source code in a macro language and generate many other languages from the same source. There are many other important and useful programming languages not covered here. Some include the following.

• C#, VB.NET, etc. (Microsoft .NET languages)
• F#, LISP, Clojure, etc. (functional languages)
• Rust, Kotlin, Racket, etc. (newer languages)
• PowerShell, Bash, etc.

I have used many of these, but they have not been yet fully integrated into my text formatter generator system.

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