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Addition in JavaScript

How to add numbers by entering manually in the number boxes in JavaScript?

To add two or more numbers in JavaScript, we can follow this approach.

<script>
        function Sum() {
            var a = document.getElementById("txtA").value;
            var b = document.getElementById("txtB").value;
            var result = parseInt(a) + parseInt(b);
            alert(result);
        }
    </script>
    
    Enter two digit:
    <input type="text" id="txtA" name="txtA" />
    +
    <input type="text" id="txtB" name="txtA" />
    <input type="button" name="btnAdd" value="Add" onclick="Sum()" />

In the above code snippet, two textboxes are there. When the button is clicked Sum function executes that gets the values of both textboxes and add it using “+” operator. At last it shows the result in the alert.

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