.386
.model small,c  
.stack 100h
 
.data
msg     db "Hello World!",0
 
.code
includelib MSVCRT
extrn printf:near
extrn exit:near
 
public main
main proc
        push    offset msg
        call    printf
        push    0
        call    exit
main endp
 
end main

class HelloWorldApp {
    public static void main(String[] args) {
        System.out.println("Hello World!"); // Display the string.
    }
}

public class Hello1
{
   public static void Main()
   {
      System.Console.WriteLine("Hello, World!");
   }
}

print "Hello, World!" 

section .data                           ; section for initialized data
str:     db 'Hello world!', 0Ah         ; message string with new-line char at the end (10 decimal)
str_len: equ $ - str                    ; calcs length of string (bytes) by subtracting this' address ($ symbol) 
                                            ; from the str's start address
 
section .text                           ; this is the code section
global _start                           ; _start is the entry point and needs global scope to be 'seen' by the 
                                            ; linker -    equivalent to main() in C/C++
_start:                                 ; procedure start
        mov     eax, 4                   ; specify the sys_write function code (from OS vector table)
        mov     ebx, 1                   ; specify file descriptor stdout -in linux, everything's treated as a file, 
                                             ; even hardware devices
        mov     ecx, str                 ; move start _address_ of string message to ecx register
        mov     edx, str_len             ; move length of message (in bytes)
        int     80h                      ; tell kernel to perform the system call we just set up - 
                                             ; in linux services are requested through the kernel
        mov     eax, 1                   ; specify sys_exit function code (from OS vector table)
        mov     ebx, 0                   ; specify return code for OS (0 = everything's fine)
        int     80h                      ; tell kernel to perform system call