.model small
.code
org 100h

start: jmp main
msg1 db "Enter a number:$"
msg2 db "Equal to 5$"
msg3 db "Lower than 5$"
msg4 db "Higher than 5$"
msg5 db 10,13,24h

main:
mov ah, 09
lea dx, msg1
int 21h

mov ah, 01
int 21h

mov bl, al
int 21h

call down

cmp bl, '5'
jE equal
jL lower
jG higher

equal:
mov ah,09
lea dx, msg2
int 21h
jmp exit

lower:
mov ah,09
lea dx,msg3
int 21h
jmp exit

higher:
mov ah,09
lea dx, msg4
int 21h

exit:
int 20h

down proc
mov ah,09
lea dx, msg5
int 21h

ret
down endp
end start