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[英]How to create a BMI calculator using JavaScript with options to choose between BMI in Kgs/metters or BMI in Lbs/feet
[英]To create a bmi calculator on my website using javascript
如何创建一个 bmi 计算器作为一个项目。但由于我是初学者,我已经编码了好几天没有任何实际成功。我想将此计算器添加到我的网站Lifestyle 。如果有人可以帮助我,那将非常有帮助java 脚本编码支持。
你有 go:
<table cellpadding="10px">
<tr>
<td>
<span>Weight:</span>
</td>
<td>
<input type="text" id="txtWeight" placeholder="Weight (kg)" />
</td>
</tr>
<tr>
<td>
<span>Height:</span>
</td>
<td>
<input type="text" id="txtHeight" placeholder="Height (cm)" />
</td>
</tr>
</table>
<input type="button" id="btnCalculate" value="Calculate" onclick="calculateBMI()" /> <br />
<span>Your Body Mass Index: </span>
<span id="lblBMI"></span>
<script>
function calculateBMI() {
var weight = parseFloat(document.getElementById('txtWeight').value);
var height = parseFloat(document.getElementById('txtHeight').value / 100);
var BMI = Math.round(weight / Math.pow(height, 2) * 10) / 10;
document.getElementById('lblBMI').value = BMI;
}
</script>
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