<!DOCTYPE html>
<html lang=”en”>
<head>
<meta charset=”UTF-8″>
<meta name=”viewport” content=”width=device-width, initial-scale=1.0″>
<title>Student Grade Calculator</title>
<style>
body {
font-family: Arial, sans-serif;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
margin: 0;
background-color: #f0f0f0;
}
.container {
background-color: #fff;
padding: 20px;
border-radius: 10px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
text-align: center;
position: relative;
}
h1 {
color: #333;
margin-bottom: 20px;
}
label {
display: block;
margin-bottom: 10px;
font-weight: bold;
}
input {
width: 100%;
padding: 10px;
margin-bottom: 20px;
border: 1px solid #ddd;
border-radius: 5px;
}
button {
background-color: #4CAF50;
color: white;
padding: 10px 20px;
border: none;
border-radius: 5px;
cursor: pointer;
font-size: 16px;
}
button:hover {
background-color: #45a049;
}
#result {
margin-top: 20px;
font-size: 18px;
font-weight: bold;
color: #333;
}
.balloon {
position: absolute;
bottom: -50px;
left: 50%;
transform: translateX(-50%);
background-color: #ff6b6b;
color: white;
padding: 10px 20px;
border-radius: 20px;
font-size: 16px;
display: none;
}
@keyframes pop {
0% {
transform: scale(0.5);
opacity: 0;
}
50% {
transform: scale(1.2);
opacity: 1;
}
70% {
transform: scale(0.9);
}
100% {
transform: scale(1);
}
}
.balloon.pop {
display: block;
animation: pop 0.5s ease;
}
</style>
</head>
<body>
<div class=”container”>
<h1>Student Grade Calculator</h1>
<label for=”score”>Enter Student’s Score:</label>
<input type=”number” id=”score” placeholder=”Enter score out of 100″>
<button onclick=”calculateGrade()”>Calculate Grade</button>
<div id=”result”></div>
<div class=”balloon” id=”balloon”>Congratulations! You have got … grade!</div>
</div>
<script>
function calculateGrade() {
const score = document.getElementById(‘score’).value;
let grade = ”;
if (score >= 85 && score <= 100) {
grade = ‘A+’;
} else if (score >= 75 && score < 85) {
grade = ‘A’;
} else if (score >= 60 && score < 75) {
grade = ‘B+’;
} else if (score >= 40 && score < 60) {
grade = ‘B’;
} else if (score >= 0 && score < 40) {
grade = ‘C’;
} else {
grade = ‘Invalid score’;
}
const resultDiv = document.getElementById(‘result’);
const balloonDiv = document.getElementById(‘balloon’);
if (grade !== ‘Invalid score’) {
resultDiv.innerText = `The grade is: ${grade}`;
balloonDiv.innerText = `Congratulations! You have got ${grade} grade!`;
balloonDiv.classList.add(‘pop’);
} else {
resultDiv.innerText = ‘Invalid score. Please enter a valid score.’;
balloonDiv.classList.remove(‘pop’);
}
}
</script>
</body>
</html>