# JS 04 – Best JavaScript program to calculate compound interest

## Best JavaScript program to calculate compound interest

It is best and simple Javascript program to calculate compound interest.

### Output: Program to calculate Compound Interest in Javascript

Compound Interest - ITVoyagers

### JavaScript code to calculate Compound Interest

#### HTML code

<!DOCTYPE html>
<html>
<meta charset="utf-8">
<title>Compound Interest - ITVoyagers</title>
<body>
<label>Principle</label><br>
<input type="text" name="val" id="principle" placeholder="Principle">
<br>
<label>Rate of Interest</label><br>
<input type="text" name="val" id="roi" placeholder="Rate of the interest">
<br>
<label>Years</label><br>
<input type="text" name="val" id="years" placeholder="Years">
<br>
<!-- itvoyagers.in -->
<button id="calculate_button" onclick="countCI()">Calculate</button>
<br>
<div id="outputdiv">
<label>Compound Interest is : <span id="outputspan"></span></label>
</div>
<script type="text/javascript" src="compoundinterest.js"></script>
<!-- itvoyagers.in -->
</body>
</html>

#### Javascript code (compoundinterest.js)

var principle = document.getElementById("principle");
var roi = document.getElementById("roi");
var years = document.getElementById("years");
var outputspan = document.getElementById("outputspan");

//itvoyagers.in
function countCI()
{
p = parseFloat(principle.value);
r = parseFloat(roi.value);
t = parseFloat(years.value);
ci = p*(Math.pow((1+r/100),t));
outputspan.innerHTML = ci;
}