Javascript program to enter two numbers and find their sum

A program to the sum of two integer values

<script type="text/javascript">

    var p, q, r;
    p = 5;
    q = 9;
    
    // calculating sum
    r = p + q;
    
    document.write("Result:: " + p + " + " + q + " = " + r);
    
</script>

Output Screen:  

A program to the sum of two integer values with minimum variable

<script type="text/javascript">

    var p, q;
    p = 5;
    q = 9;
    
    // calculating sum
    p = p + q;
    
    document.write("Result:: " + p);
    
</script>

Output Screen: