WebLab(24/9/24)

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>JavaScript Pop-Up Boxes</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 20px;
        }
        button {
            margin: 5px;
            padding: 10px 15px;
            font-size: 16px;
        }
    </style>
</head>
<body>
    <h1>JavaScript Pop-Up Box Examples</h1>

    <button onclick="displayDate()">Display Date</button>
    <input type="text" id="dateOutput" readonly />

    <button onclick="calculateFactorial()">Calculate Factorial</button>

    <button onclick="multiplicationTable()">Multiplication Table</button>

    <button onclick="sumOfNumbers()">Sum of Numbers</button>

    <script src="script.js"></script>
</body>
</html>


function displayDate() {
    const currentDate = new Date().toLocaleDateString();
    document.getElementById('dateOutput').value = currentDate;
}

function calculateFactorial() {
    let n = prompt("Enter a number to calculate its factorial:");
    n = parseInt(n);
    if (isNaN(n) || n < 0) {
        alert("Please enter a non-negative integer.");
        return;
    }
    let factorial = 1;
    for (let i = 1; i <= n; i++) {
        factorial *= i;
    }
    alert(`The factorial of ${n} is ${factorial}.`);
}

function multiplicationTable() {
    let n = prompt("Enter a number to generate its multiplication table:");
    n = parseInt(n);
    if (isNaN(n)) {
        alert("Please enter a valid number.");
        return;
    }
    let table = "";
    for (let i = 1; i <= 10; i++) {
        table += `${n} x ${i} = ${n * i}\n`;
    }
    alert(`Multiplication table for ${n}:\n${table}`);
}

function sumOfNumbers() {
    let n = prompt("Enter the total number of terms to sum:");
    n = parseInt(n);
    if (isNaN(n) || n <= 0) {
        alert("Please enter a positive integer.");
        return;
    }

    let sum = 0;
    for (let i = 1; i <= n; i++) {
        let nextNum = prompt(`Enter number ${i}:`);
        nextNum = parseFloat(nextNum);
        if (isNaN(nextNum) || nextNum < 0) {
            alert("Please enter a valid number.");
            i--;
        } else {
            sum += nextNum;
        }
    }
    alert(`The sum of the ${n} numbers is ${sum}.`);
}