An Assembly Language Program to print Lower Case Letters from a to z in reverse order

Assembly Language Programming 3,118 Views

An Assembly Language Program to print Lower Case Letters from a to z in reverse order .

 .MODEL SMALL
 .STACK 100H

 .DATA
    PROMPT  DB  'The Lower Case Letters from z to a are: $'

 .CODE
   MAIN PROC
     MOV AX, @DATA                ; initialize DS 
     MOV DS, AX

     LEA DX, PROMPT               ; load and print PROMPT 
     MOV AH, 9
     INT 21H

     MOV CX, 26                   ; initialize CX

     MOV AH, 2                    ; set output function  
     MOV DL, 122                  ; set Dl with 'z'

     @LOOP:                       ; loop start
       INT 21H                    ; print character

       DEC DL                     ; increment DL to next ASCII character
       DEC CX                     ; decrement CX
       
     JNZ @LOOP                    ; Jump to label @LOOP if CX is 0f

     MOV AH, 4CH                  ; return control to DOS
     INT 21H
   MAIN ENDP
 END MAIN

.MODEL SMALL

.STACK 100H

.DATA

PROMPT DB 'The Lower Case Letters from z to a are: $'

.CODE

MAIN PROC

MOV AX, @DATA ; initialize DS

MOV DS, AX

LEA DX, PROMPT ; load and print PROMPT

MOV AH, 9

INT 21H

MOV CX, 26 ; initialize CX

MOV AH, 2 ; set output function

MOV DL, 122 ; set Dl with 'z'

@LOOP: ; loop start

INT 21H ; print character

DEC DL ; increment DL to next ASCII character

DEC CX ; decrement CX

JNZ @LOOP ; Jump to label @LOOP if CX is 0f

MOV AH, 4CH ; return control to DOS

INT 21H

MAIN ENDP

END MAIN

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An Assembly Language Program to print Lower Case Letters from a to z in reverse order

An Assembly Language Program to print Lower Case Letters from a to z in reverse order .

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