Hello,
!

let hello = function(name='World'){
    console.log(`Hello ${name}`);
}

hello('John Doe');

#include 
using namespace std;

int main() {
	cout << "Hello world!";
	return 0;
}

++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>++.

HELLO WORLD!

(* http://patorjk.com/software/taag/#p=display&f=1Row&t=Hello%2C%20World! *)
(* ocamlc -o hello src/hello.ml *)
print_string "|-| [- |_ |_ ()   \\/\\/ () /? |_ |) !";;

global _start

section .text

_start:
  mov rax, 1        ; write(
  mov rdi, 1        ;   STDOUT_FILENO,
  mov rsi, msg      ;   "Hello, world!\n",
  mov rdx, msglen   ;   sizeof("Hello, world!\n")
  syscall           ; );

  mov rax, 60       ; exit(
  mov rdi, 0        ;   EXIT_SUCCESS
  syscall           ; );

section .rodata
  msg: db "Hello, world!", 10
  msglen: equ $ - msg

print("Hello World")

#include 
int main() {
	printf("Hello World\n");
}

using System;

public class HelloWorld {
    public static void Main(string[] args) {
        Console.WriteLine("Hello World");
    }
}

if __name__ == "__main__":
  print("Hello world")

puts "Hello World"

CLS
PRINT "Hello World!"