JSExamples/Example3.html at main · kl2400030727/JSExamples · GitHub

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<!DOCTYPE html>
<html>
<head>
    <title>Simple Calculator</title>
    <style>
        #result {
            color: blue;
        }
    </style>
</head>
<body>
    <h2>Simple Calculator</h2>
    <input type="text" id="klu" placeholder="Enter expression">
    <button onclick="calculate()">=</button>
    <button onclick="clearDisplay()">Clear</button>

    <h1 id="result"></h1>

    <script>
        function calculate() {
            try {
                const expr = document.getElementById('klu').value;
                const output = eval(expr);
                document.getElementById('result').textContent = output;
            } catch {
                document.getElementById('result').textContent = 'Error';
            }
        }

        function clearDisplay() {
            document.getElementById('klu').value = "";
            document.getElementById('result').textContent = "";
        }
    </script>
</body>
</html>