In this article, I will show you how to add numbers in html using onkeyup() event in JavaScript. Here, when the user enters the values in the first two textbox values without pressing any buttons it sums the values automatically in the third textbox.
SCRIPT CODE:
<script type="text/javascript" src="//code.jquery.com/jquery-1.10.2.js"></script>
<script type="text/javascript">
function sum() {
var txtFirstNo = document.getElementById('txtFirstNo').value;
var txtSecondNo = document.getElementById('txtSecondNo').value;
var result = parseInt(txtFirstNo) + parseInt(txtSecondNo);
if (!isNaN(result)) {
document.getElementById('txtResult').value = result;
}
}
</script>
HTML CODE:
<div style="border:1px solid gray;width: 450px; height:300px">
<h2>Add two textbox values without pressing anybuttons</h2>
<input type="text" id="txtFirstNo" placeholder="pleaseenterFirst Number" onkeyup="sum()" />
<input type="text" id="txtSecondNo" placeholder="pleaseenterSecond Number" onkeyup="sum()" />
<br />
<div style="padding-top:10px">
Result:
<input type="text" id="txtResult" />
</div></div>
Output:
Below video will demonstrate how to add two textbox values and display the sum in a third using onkeyup() event in JavaScript. Here, when the user enters the values in the first two textbox values without pressing any buttons it sums the values automatically in the third textbox.
Post your comments / questions
Recent Article
- How to programmatically modifying the AppSetting value in web.config using c#?
- TypeError [ERR_INVALID_CALLBACK]: Callback must be a function. Received undefined
- How to calculate the age from jQuery ui datepicker using c#?
- How to calculate days difference between two dates in c#?
- Changing date format in jQuery ui datepicker
- How to set value to nicedit textarea using jQuery?
- How to load data from json file in angular?
- cannot find module consider using '--resolvejsonmodule' to import module with json extension angular
Related Article