Factorial : 8086 ALP

TITLE Factorial of a number

.model small

.stack

.data

num db 5

fact db ?

.code

main proc

    mov ax,@data

    mov ds,ax

    mov si,offset num

    mov al,1

    mov bl,num

    back: mul bl

    dec bl

    jnz back

    mov fact,al

    mov ah,4ch

    int 21h     

main endp

end main