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Program 2: Sum of Two Numbers

    

**Program 2: Sum of Two Numbers**


```assembly

.model small

.stack 100h


.data

    num1 dw 5

    num2 dw 7

    result dw ?


.code

    main proc

        mov ax, num1        ; Load first number into AX

        add ax, num2        ; Add second number to AX

        mov result, ax      ; Store result in 'result'

        

        mov ah, 4Ch          ; Exit program

        int 21h

    main endp

end main

```


Explanation:

1. `.model small` and `.stack 100h`: Memory model and stack size definitions.

2. `.data` section: Declares the data segment.

   - `num1 dw 5`: Defines a word-sized variable named "num1" with value 5.

   - `num2 dw 7`: Defines a word-sized variable named "num2" with value 7.

   - `result dw ?`: Defines a word-sized uninitialized variable named "result".

3. `.code` section: Contains the main code.

   - `mov ax, num1`: Move the value of "num1" into the AX register.

   - `add ax, num2`: Add the value of "num2" to the value in AX.

   - `mov result, ax`: Store the result in the "result" variable.

   - `mov ah, 4Ch`: Set the exit code for DOS.

   - `int 21h`: Call DOS interrupt to exit the program.


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