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Take an input & display it in console [Assembly Language Programming]

.MODEL SMALL
.STACK 100H
.DATA
MSG DB 'Enter a number: $'
.CODE
MAIN PROC
    MOV AX, @DATA       ; initialize DS
    MOV DS, AX
    
    LEA DX, MSG             ; load & display MSG
    MOV AH, 9
    INT 21H
    
    MOV AH, 1                  ; takes input
    INT 21H
    MOV BL, AL
    
    MOV DL, 0DH              ; display character function
    MOV AH, 2                   ; carriage return
    INT 21H                       ; execute carriage return
    MOV DL, 0AH              ; line feed
    INT 21H                       ; execute line feed
    
    MOV DL, BL
    
    MOV AH, 2                   ; load & display output
    INT 21H
    MAIN ENDP
END MAIN
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