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7.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Percentage Calculator</title>
<style>
body {
font-family: Arial, sans-serif;
margin: 20px;
}
h1 {
text-align: center;
}
form {
max-width: 600px;
margin: 20px auto;
}
label {
display: block;
margin-bottom: 8px;
}
input {
width: 100%;
padding: 8px;
margin-bottom: 16px;
box-sizing: border-box;
}
button {
background-color: #4CAF50;
color: white;
padding: 10px 20px;
border: none;
border-radius: 4px;
cursor: pointer;
}
#semesterFields {
display: none;
}
</style>
</head>
<body>
<h1>Percentage Calculator</h1>
<form id="percentageForm">
<label for="semesters">How many semesters have you appeared so far?</label>
<input type="number" id="semesters" name="semesters" min="1" max="8" required>
<div id="semesterFields"></div>
<button type="button" onclick="calculatePercentage()">Calculate Percentage</button>
<p id="resultMessage"></p>
</form>
<script>
function generateSemesterFields(numSemesters) {
var semesterFieldsContainer = document.getElementById('semesterFields');
semesterFieldsContainer.innerHTML = ''; // Clear previous fields
for (var i = 1; i <= numSemesters; i++) {
var label = document.createElement('label');
label.textContent = `Enter marks for Semester ${i}:`;
var input = document.createElement('input');
input.type = 'number';
input.min = '0';
input.max = '100';
input.placeholder = 'Marks for Semester ' + i;
input.required = true;
semesterFieldsContainer.appendChild(label);
semesterFieldsContainer.appendChild(input);
}
semesterFieldsContainer.style.display = 'block';
}
function calculatePercentage() {
var numSemesters = document.getElementById('semesters').value;
var semesterFields = document.querySelectorAll('#semesterFields input');
var totalMarks = numSemesters * 100;
var obtainedMarks = 0;
semesterFields.forEach(function (input) {
obtainedMarks += parseFloat(input.value) || 0;
});
var percentage = (obtainedMarks / totalMarks) * 100;
var resultMessage = `Obtained Percentage: ${percentage.toFixed(2)}%`;
document.getElementById('resultMessage').textContent = resultMessage;
}
document.getElementById('semesters').addEventListener('input', function () {
var numSemesters = this.value;
generateSemesterFields(numSemesters);
});
</script>
</body>
</html>