Rajkumar562/task10.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Function Calculator</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            background-color: #f5f5f5;
            margin: 0;
            padding: 20px;
        }
        
        .container {
            max-width: 400px;
            margin: 0 auto;
            background-color: #ffffff;
            border-radius: 8px;
            padding: 20px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        }
        
        h1 {
            font-size: 24px;
            font-weight: bold;
            margin-bottom: 20px;
        }
        
        label {
            display: block;
            margin-bottom: 10px;
            font-weight: bold;
        }
        
        input[type="number"] {
            width: 100%;
            padding: 5px;
            border: 1px solid #cccccc;
            border-radius: 4px;
        }
        
        select {
            width: 100%;
            padding: 5px;
            border: 1px solid #cccccc;
            border-radius: 4px;
        }
        
        .result {
            margin-top: 20px;
            background-color: #f9f9f9;
            border: 1px solid #cccccc;
            padding: 10px;
            white-space: pre-wrap;
            font-family: monospace;
            font-size: 14px;
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>Function Calculator</h1>
        <form id="functionForm">
            <label for="functionSelect">Select a function:</label>
            <select id="functionSelect" required>
                <option value="">-----Select-----</option>
                <option value="linear">Linear (x)</option>
                <option value="inverse">Inverse (1/x)</option>
                <option value="log">Log (log(x))</option>
            </select>
            <label for="numberInput">Enter a number:</label>
            <input type="number" id="numberInput" required>
            <button type="submit">Submit</button>
        </form>
        
        <div class="result" id="resultContainer"></div>
    </div>

    <script>
        document.getElementById("functionForm").addEventListener("submit", function(event) {
            event.preventDefault(); // Prevent form submission
            
            var functionSelect = document.getElementById("functionSelect");
            var selectedFunction = functionSelect.value;
            
            var numberInput = document.getElementById("numberInput");
            var number = parseFloat(numberInput.value);
            
            if (selectedFunction === "inverse" && number === 0) {
                alert("Wrong input: Cannot divide by zero");
                return;
            }
            
            if (selectedFunction === "log" && (number <= 0 || isNaN(number))) {
                alert("Wrong input: Input must be a positive number");
                return;
            }
            
            var result;
            
            switch (selectedFunction) {
                case "linear":
                    result = number;
                    break;
                case "inverse":
                    result = 1 / number;
                    break;
                case "log":
                    result = Math.log(number);
                    break;
                default:
                    result = "Unknown function";
                    break;
            }
            
            var resultContainer = document.getElementById("resultContainer");
            resultContainer.textContent = "Result: " + result;
            
            var formData = {
                selectedFunction: selectedFunction,
                number: number,
                result: result
            };
            
            var json = JSON.stringify(formData, null, 2);
            resultContainer.textContent += "\n\n" + json;
        });
    </script>
</body>
</html>