A “Hello, World!” program is traditionally used to introduce novice programmers to a programming language.
Source: Wikipedia
Python example:
#!/usr/bin/env python
print('Hello, world!')
For more examples
Java: example
public class Main {
public static void main(String[] args) {
System.out.println("Hello, World!");
}
}
C# example:
using System;
class Program
{
public static void Main(string[] args)
{
Console.WriteLine("Hello, World!");
}
}
JavaScript example:
document.write('Hello, World!');
Ruby example:
puts "Hello, world!"
C example:
#include <stdio.h>
int main() {
printf("Hello, World!");
return 0;
}