How to subtract two numbers in 8086 Assembly language

 

Assembly language program to subtract two numbers using procedure. 

.model small
.stack 100h
.data
n1 db "Enter first no:$"
n2 db 10d,"Enter second no:$"
ans db 10d,"Subtraction is:$"
.code
mov ax,@data
mov ds,ax

mov ah,9
mov dx,offset n1
int 21h
CALL input1

mov ah,9
mov dx,offset n2
int 21h
CALL input2

mov ah,9
mov dx,offset ans
int 21h
sub bl,al

add bl,48
mov dl,bl
mov ah,2
int 21h

mov ah,4ch
int 21h

input1 PROC
mov ah,1
int 21h
mov bl,al
RET
input1 ENDP

input2 PROC
mov ah,1
int 21h
RET
input2 ENDP
ends

end

Output

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