Hello World Program : First program while learning Programming

This article introduces us with how to write the first computer program of “Hello World”, across various languages. Along with the programs, the comments are provided for a better understanding of the terminologies and keywords used in the program

Learning any programming can be simplified into:

• Writing the program in a text-editor and saving it with correct extension(.CPP, .C, .CSHARP, .JAVA, etc)
• Compiling the program using a compiler or online IDE
• Understanding the basic terminologies.

The “Hello World” program is the first step towards learning any programming language and also one of the simplest programs you will learn. All you have to do is display the message “Hello World” on the screen. Let us now look at the program in most of the language:

Here are the links to all the individual “Hello World” programs in different languages:

1. Hello World in C
   

   C

   
   

   
   

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   // Simple C program to // display "Hello World"    // Header file for // input output functions #include <stdio.h>    // main function - // where the execution of // program begins int main() {        // prints hello world     printf("Hello World");        return 0; }

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2. Hello World in C++
   

   C++

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   // Simple C++ program to // display "Hello World"    // Header file for // input output functions #include <iostream>    using namespace std;    // main function - // where the execution of // program begins int main() {     // prints hello world     cout << "Hello World";        return 0; }

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3. Hello World in C#
   

   C#

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   // C# program to print Hello World!    using System;    // namespace declaration namespace HelloWorldApp {    // Class declaration class Geeks {        // Main Method     static void Main(string[] args)     {            // statement         // printing Hello World!         Console.WriteLine("Hello World");            // To prevents the screen from         // running and closing quickly         Console.ReadKey();     } } }

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4. Hello World in Java

   Java

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   // This is a simple Java program. // FileName : "HelloWorld.java"    class HelloWorld {        // Your program begins     // with a call to main().     // Prints "Hello, World"     // to the terminal window.     public static void main(         String args[])     {         System.out.println("Hello World");     } }

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5. Hello World in Python

   Python

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   # Python code for "Hello World"     print("Hello World")

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6. Hello World in Perl

   Perl

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   #!/usr/bin/perl     # Modules used  use strict;  use warnings;     # Print function  print("Hello World\n");     # To run the code refer: # http://bit.ly/2qLYVTG

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7. Hello World in Scala

   Scala

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   // Scala program to print Hello World!     object Geeks  {         // Main Method      def main(args: Array[String])      {             // prints Hello World          println("Hello World")      }  }

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8. Hello World in Go

   Go

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   // Go program to print Hello World!    package main        import "fmt"        // Main function     func     main() {        // prints Hello World     fmt.Println("!... Hello World ...!") }

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9. Hello World in PHP

   PHP

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   <!DOCTYPE html> <html> <body>    <?php echo "Hello World"; ?>     </body> </html>

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10. Hello World in HTML

    HTML

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    <html> <header><title></title></header> <body> Hello World </body> </html>

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11. Hello World in JavaScript

    JavaScript

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    <script>     // using console.log  console.log('Hello World');  </script>

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Below are the codes of all the languages:

Output:

Hello World

Chinmoy Lenka

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