learn asm and nasm code example

Example: nasm assebly hello world

section .data
		getBanner db "Hello, World!", 0xa        ; String To Be Printed
        lenGetBanner equ $-getBanner             ; Get Length of String
        
section .text
		global _start
        
_start:
		; Display Banner
        mov edx, lenGetBanner                    ; Message Length
        mov ecx, getBanner                       ; Message to write
        mov ebx, 1                               ; File Descriptor (stdout)
        mov eax, 4                               ; Call Sys_Write
        int 80h                                  ; Call Kernel