代碼如下：
<!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>假如投資多年的利率為5%，試求從1000塊增長到5000塊，需要花費多少年</title>
<script type="text/javascript">
var money = 1000;
var year = 0;
while(money <= 5000){
money = money +(money*0.05);
year++;
console.log("第" + year + "年，有" + money + "元"+"<br />");
}
</script>
</head>
<body>
</body>
</html>
運作結果如下：
或者也可以這樣：
代碼：
<!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>假如投資多年的利率為5%，試求從1000塊增長到5000塊，需要花費多少年</title>
<script type="text/javascript">
var money = 1000;
var year = 0;
while(money <= 5000){
money = money +(money*0.05);
year++;
}
console.log("第" + year + "年，有" + money + "元"+"<br />");
</script>
</head>
<body>
</body>
</html>
運作結果：
