42 lines
1.2 KiB
JavaScript
42 lines
1.2 KiB
JavaScript
|
"use strict";
|
||
|
|
|
||
|
|
const calculateFutureValue = (investment, rate, years) => {
|
||
|
|
if ( isNaN(investment) || investment <= 0 || isNaN(rate) || rate <= 0 || isNaN(years) || years <= 0 ) {
|
||
|
|
// add a throw statement here to make sure the passed arguments are valid
|
||
|
|
}
|
||
|
|
|
||
|
|
// add a throw statement here to test the exception handling
|
||
|
|
|
||
|
|
let futureValue = investment;
|
||
|
|
for (let i = 1; i <= years; i++ ) {
|
||
|
|
futureValue += futureValue * rate / 100;
|
||
|
|
}
|
||
|
|
return futureValue.toFixed(2);
|
||
|
|
};
|
||
|
|
|
||
|
|
$(document).ready( () => {
|
||
|
|
$("#calculate").click( () => {
|
||
|
|
$("#message").text("");
|
||
|
|
const investment = parseFloat($("#investment").val());
|
||
|
|
const rate = parseFloat($("#rate").val());
|
||
|
|
const years = parseFloat($("#years").val());
|
||
|
|
|
||
|
|
const fv = calculateFutureValue(investment, rate, years);
|
||
|
|
$("#future_value").val(fv);
|
||
|
|
$("#investment").focus();
|
||
|
|
$("#investment").select();
|
||
|
|
});
|
||
|
|
|
||
|
|
|
||
|
|
$("#clear").click( function() {
|
||
|
|
$("#investment").val("");
|
||
|
|
$("#rate").val("");
|
||
|
|
$("#years").val("");
|
||
|
|
$("#future_value").val("");
|
||
|
|
$("#message").text("");
|
||
|
|
|
||
|
|
$("#investment").focus();
|
||
|
|
});
|
||
|
|
|
||
|
|
$("#investment").focus();
|
||
|
|
});
|