1.asm

SECTION .data   ;initialized data
; db = define byte (8-bit), dw = define word (16-bit), dd = define double-word (32-bit), equ = constant

msg: db "Hello world!",10,0 ; this is our message
;printf

SECTION .bss ;uninitialized data
; resb resw resd = db dw dd

SECTION .text   ;asm code
extern printf
global main
main:
    push ebp
    mov ebp, esp

    push msg
    call printf

    mov esp, ebp
    pop ebp
    ret