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.model small
.stack 200H
.data
     msg1 DB 10,13,'Enter limit: $'
     msg2 DB 10,13,'Enter the numbers:  $'
     msg3 DB 10,13,'Sum = $'
     newline DB 10,13, ' $'
     sum DW 0

.code
    printstring MACRO msg     ;macro definition

                PUSH AX
                PUSH DX
                MOV AH,09H
                MOV DX,offset msg
                INT 21H
                POP DX
                POP AX
            ENDM

.startup

            printstring msg1
            CALL readnumtoAX       ;enter the limit
            MOV CX,AX                    ;cx?limit
            printstring newline
        printstring msg2



label1:      printstring newline
            CALL readnumtoAX       ;enter the no.s
               ADD sum,AX               ;sum=sum+ax
            DEC CX                          ;cx?cx-1
            JNZ label1
            printstring newline
            printstring msg3            ;print sum
            MOV AX,sum
            CALL displayAX

.exit




 readnumtoAX PROC NEAR
                                        ;procedure def. For reading-
            PUSH BX            ; char to ax register
            PUSH CX
                MOV CX,10
            MOV BX,00
 back:     MOV AH,01H
                 INT 21H
                 CMP AL,'0'
                  JB skip
                 CMP AL,'9'
                 JA skip
                SUB AL,'0'
                PUSH AX
                MOV AX,BX
                MUL CX
                MOV BX,AX
                POP AX
                MOV AH,00
                ADD BX,AX
                JMP back
     skip:
                 MOV AX,BX
                 POP CX
                 POP BX
                 RET
     readnumtoAX ENDP


displayAX PROC NEAR
                           ;procedure def. For display
                           ;a character
            PUSH DX
            PUSH CX
            PUSH BX
            PUSH AX
            MOV CX,0
back1:      MOV BX,10
            MOV DX,0
            DIV BX
            PUSH DX
            INC CX
            OR AX,AX
            JNZ back1
back2:
            POP DX
            ADD DL,30H
            MOV AH,02H
            INT 21H
            LOOP back2
            POP AX
            POP BX
            POP CX
            POP DX
            RET
displayAX ENDP

END