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bmicalc.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title></title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css">
</head>
<body>
<div class="container">
<div class="card">
<div class="card-header text-center">BMI Calculator</div>
<div class="card-body">
<form class="w-50 m-auto" onsubmit="return false" id="demo">
<div class="form-group">
<label >Weight:</label>
<input type="text" name="" id="weight" placeholder="mass in kg" class="form-control">
</div>
<div class="form-group">
<label >Height:</label>
<input type="text" name="" id="height" placeholder="Heght in feet" class="form-control">
</div>
<div class="form-group">
<label >BMI value:</label>
<input type="number" name="" id="bmi" class="form-control">
</div>
<div>
<button type="submit" class=" btn btn-success" onclick= "getbmi()"> Check BMI</button>
</div>
</form>
</div>
<div class="card-header text-center">A healthy BMI range between 19 and 25.</div>
</div>
</div>
<script>
function getbmi(){
var weight=document.getElementById('weight').value;
var height=document.getElementById('height').value;
height = height * 12;
height = height * 0.025;
var newbmi = weight / Math.pow(height,2);
newbmi = Math.round(newbmi);
// document.write(newbmi);
document.getElementById('bmi').value=newbmi;
}
</script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/jquery.slim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/umd/popper.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js"></script>
</body>
</html>