HTMLJavaScript编写网页计算3+6+9+12+15+18+21+24+27+30+33+36
时间: 2023-12-12 20:35:07 浏览: 26
以下是使用HTML和JavaScript编写的计算3+6+9+12+15+18+21+24+27+30+33+36的网页示例:
```html
<!DOCTYPE html>
<html>
<head>
<title>计算3+6+9+12+15+18+21+24+27+30+33+36</title>
<meta charset="UTF-8">
<script>
function calculate() {
var sum = 0;
for (var i = 3; i <= 36; i += 3) {
sum += i;
}
document.getElementById("result").innerHTML = "计算结果为:" + sum;
}
</script>
</head>
<body>
<h1>计算3+6+9+12+15+18+21+24+27+30+33+36</h1>
<button onclick="calculate()">点击计算</button>
<p id="result"></p>
</body>
</html>
```
在这个示例中,我们使用了HTML来创建网页的基本结构,并使用JavaScript来计算3+6+9+12+15+18+21+24+27+30+33+36的结果。具体来说,我们在HTML中创建了一个按钮和一个段落元素,当用户点击按钮时,JavaScript代码会计算结果并将其显示在段落元素中。
相关问题
编写html+css+js计算体重BMI的完整网页的源代码
当然,我可以帮你回答这个问题!以下是一个简单的BMI计算器的HTML、CSS和JavaScript代码:
HTML代码:
```
<!DOCTYPE html>
<html>
<head>
<title>BMI Calculator</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<h1>BMI Calculator</h1>
<div>
<label for="weight">Weight (kg):</label>
<input type="number" id="weight" required>
</div>
<div>
<label for="height">Height (cm):</label>
<input type="number" id="height" required>
</div>
<button onclick="calculateBMI()">Calculate</button>
<div id="result"></div>
<script src="script.js"></script>
</body>
</html>
```
CSS代码:
```
body {
font-family: Arial, sans-serif;
margin: 0;
padding: 0;
}
h1 {
text-align: center;
}
div {
margin: 10px 0;
}
label {
display: inline-block;
width: 120px;
}
input {
padding: 5px;
}
button {
margin-top: 10px;
padding: 10px;
background-color: #008CBA;
color: white;
border: none;
border-radius: 5px;
font-size: 16px;
cursor: pointer;
}
#result {
margin-top: 20px;
}
```
JavaScript代码:
```
function calculateBMI() {
var weight = document.getElementById("weight").value;
var height = document.getElementById("height").value / 100;
var bmi = weight / (height * height);
var category = "";
if (bmi < 18.5) {
category = "Underweight";
} else if (bmi < 25) {
category = "Normal weight";
} else if (bmi < 30) {
category = "Overweight";
} else {
category = "Obese";
}
document.getElementById("result").innerHTML = "Your BMI is " + bmi.toFixed(1) + ", which means you are " + category + ".";
}
```
希望这个代码对您有所帮助!
使用html+css+js编写计算BMI的网页源代码
很高兴回答你的问题!下面是使用 HTML、CSS 和 JavaScript 编写计算BMI的网页源代码:
HTML 代码:
```
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>BMI 计算器</title>
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
<h1>BMI 计算器</h1>
<label for="height">身高(cm):</label>
<input type="number" id="height" name="height"><br>
<label for="weight">体重(kg):</label>
<input type="number" id="weight" name="weight"><br>
<button onclick="calculateBMI()">计算 BMI</button><br>
<label for="result">BMI 指数:</label>
<input type="number" id="result" name="result" disabled><br>
<label for="level">BMI 等级:</label>
<input type="text" id="level" name="level" disabled><br>
<script src="script.js"></script>
</body>
</html>
```
CSS 代码:
```
h1 {
font-size: 30px;
text-align: center;
}
label {
display: inline-block;
width: 100px;
font-size: 20px;
}
input[type="number"] {
width: 150px;
font-size: 20px;
}
button {
font-size: 20px;
margin-top: 10px;
}
input[type="text"] {
width: 150px;
font-size: 20px;
}
```
JavaScript 代码:
```
function calculateBMI() {
var height = document.getElementById("height").value;
var weight = document.getElementById("weight").value;
var bmi = weight / (height / 100 * height / 100);
document.getElementById("result").value = bmi.toFixed(2);
if (bmi < 18.5) {
document.getElementById("level").value = "偏瘦";
} else if (bmi < 24) {
document.getElementById("level").value = "正常";
} else if (bmi < 28) {
document.getElementById("level").value = "偏胖";
} else {
document.getElementById("level").value = "肥胖";
}
}
```
希望对你有所帮助!