section .data                       ;Data section to declare constants, messages
        m1 db 10,"Hello World!"      ;Hello Word" ; message declaration with define byte(db) 10 for new line
        l1 equ $- m1
        m2 db 10,"I am Abhishek Masali"
        l2 equ $- m2              ; length of the message (l1)

section .text                       ; main program section
    global _start
_start:
;------------------------ print message code -------------------------------------------------------------------
    mov rax, 1          ; system call for write
    mov rdi, 1          ; file handle 1 is stdout
    mov rsi, m1         ; address of string to output
    mov rdx, l1         ; number of bytes
    syscall             ; invoke operating system to do the write
    mov rax, 1          ; system call for write
    mov rdi, 1          ; file handle 1 is stdout
    mov rsi, m2         ; address of string to output
    mov rdx, l2         ; number of bytes
    syscall     
;----------------------------- exit code---------------------------------------------------------------------------
    mov rax, 60 ; system call for exit
    mov rdi, 0 ; exit code 0
    syscall ; invoke operating system to exit