Lab Activity 3 (Add 10 then Subtract 5) using Assembly Language

.model small

.data

    prompt db "Enter favorite number (0 - 9): $"
    result db ? 13, 10, "Value = $"

.code

main proc far

    mov ax, @data
    mov ds, ax

    lea dx, prompt  ; print 'prompt' variable
    mov ah, 09h
    int 21h

    mov ah, 1       ; input number
    int 21h
    mov bl, al

    add bl, 10      ; add 10 to bl
    sub bl, 5       ; subtract 5 from bl

    lea dx, result  ; print 'result' variable
    mov ah, 09h
    int 21h

    mov ah, 2       ; print the value in bl
    mov dl, bl
    int 21h

    mov ah, 4ch     ; end program
    int 21h

endp

end main