User:LaluShi/common.js

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function calculate() {
    // Get input values
    var num1 = parseFloat(document.getElementById('num1').value);
    var num2 = parseFloat(document.getElementById('num2').value);
    
    // Get selected operation
    var operation = document.getElementById('operation').value;
    
    // Perform calculation based on operation
    var result;
    switch(operation) {
        case 'addition':
            result = num1 + num2;
            break;
        case 'subtraction':
            result = num1 - num2;
            break;
        case 'multiplication':
            result = num1 * num2;
            break;
        case 'division':
            result = num1 / num2;
            break;
        default:
            result = 'Invalid operation';
    }
    
    // Display result
    document.getElementById('result').innerHTML = "Result: " + result;
}