Basic_Calculator/index.html at main · Ishaa80/Basic_Calculator · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>My Calculator</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
    <body>
        <h1>CALCULATOR</h1>
        <div class="main">
            <form>
                <table border="1">
                    <tr>
                        <td colspan="4">
                            <input type="text" id="output" readonly class="input-btn" placeholder="0">
                        </td>
                    </tr>
                    <tr>
                        <td><button type="button" onclick="appendValue('1')">1</button></td>
                        <td><button type="button" onclick="appendValue('2')">2</button></td>
                        <td><button type="button" onclick="appendValue('3')">3</button></td>
                        <td><button type="button" onclick="appendValue('+')">+</button></td>
                    </tr>
                    <tr>
                        <td><button type="button" onclick="appendValue('4')">4</button></td>
                        <td><button type="button" onclick="appendValue('5')">5</button></td>
                        <td><button type="button" onclick="appendValue('6')">6</button></td>
                        <td><button type="button" onclick="appendValue('-')">-</button></td>
                    </tr>
                    <tr>
                        <td><button type="button" onclick="appendValue('7')">7</button></td>
                        <td><button type="button" onclick="appendValue('8')">8</button></td>
                        <td><button type="button" onclick="appendValue('9')">9</button></td>
                        <td><button type="button" onclick="appendValue('*')">*</button></td>
                    </tr>
                    <tr>
                        <td><button type="button" onclick="appendValue('.')">.</button></td>
                        <td><button type="button" onclick="appendValue('0')">0</button></td>
                        <td><button type="button" onclick="calculate()">=</button></td>
                        <td><button type="button" onclick="appendValue('/')">/</button></td>
                    </tr>
                    <tr>
                        <td colspan="4">
                            <button type="button" style="width: 100%; background-color: rgb(240, 128, 128);" onclick="reset()">Reset</button>
                        </td>
                    </tr>
                </table>
            </form>
        </div>

        <script>
            let output = document.getElementById('output');

            // Function to append value to the output
            function appendValue(value) {
                if (output.value === '0' || output.value === "Answer will be shown here..") {
                    output.value = value;
                } else {
                    output.value += value;
                }
            }

            // Function to calculate the result
            function calculate() {
                try {
                    output.value = eval(output.value);
                } catch (e) {
                    output.value = "Error";
                }
            }

            // Function to reset the calculator
            function reset() {
                output.value = '0';
            }
        </script>
    </body>
    </html>
<!-- </html> -->