Most of the programmers start programming by printing Hello World on the screen/console.

A Hello, World! program is traditionally used to introduce novice programmers to a programming language.

It is also traditionally used in a sanity test to make sure that a computer language is correctly installed, and that the operator understands how to use it.

Hello World program can be written differently in different langugaes.

C

#include <stdio.h>
int main()
{
   printf("Hello, World!"); // printf() displays the string inside quotation
   return 0;
}

Java

public class HelloWorld {
   public static void main(String[] args) {
      System.out.println("Hello, World"); // Prints "Hello, World" in the terminal window.
   }
}

PHP

<?php
    echo "Hello World!";
?>

Python

print("Hello World")

Ruby

puts "Hello World"