\n in Nasm

  GNU nano 2.2.6                                                        File: Hello.asm                                                                                                                      

section .text
        global _start:

_start:
        mov edx, len
        mov ecx, msg
        mov ebx, 1
        mov eax, 4
        int 0x80

        mov eax, 1
        int 0x80

section .rodata
        msg db 'Hello World\n'
        len equ $-msg