Career_Webdevelopment/11111.html at main · theusmandev/Career_Webdevelopment · 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>Calculator</title>
    <style>
        .calculator {
            width: 200px;
            margin: auto;
            text-align: center;
        }

        #display {
            width: 100%;
            margin-bottom: 10px;
            padding: 5px;
            font-size: 20px;
        }

        .keys {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
        }

        button {
            padding: 10px;
            margin: 5px;
            font-size: 18px;
        }
    </style>
</head>
<body>
    <div class="calculator">
        <input type="text" id="display" disabled>
        <div class="keys">
            <button onclick="appendNumber('7')">7</button>
            <button onclick="appendNumber('8')">8</button>
            <button onclick="appendNumber('9')">9</button>
            <button onclick="appendOperator('+')">+</button>
            <button onclick="appendNumber('4')">4</button>
            <button onclick="appendNumber('5')">5</button>
            <button onclick="appendNumber('6')">6</button>
            <button onclick="appendOperator('-')">-</button>
            <button onclick="appendNumber('1')">1</button>
            <button onclick="appendNumber('2')">2</button>
            <button onclick="appendNumber('3')">3</button>
            <button onclick="appendOperator('*')">*</button>
            <button onclick="appendNumber('0')">0</button>
            <button onclick="appendDecimal()">.</button>
            <button onclick="calculate()">=</button>
            <button onclick="appendOperator('/')">/</button>
            <button onclick="clearDisplay()">C</button>
        </div>
    </div>

    <script>
        function appendNumber(number) {
            document.getElementById('display').value += number;
        }

        function appendOperator(operator) {
            document.getElementById('display').value += operator;
        }

        function appendDecimal() {
            let currentValue = document.getElementById('display').value;
            if (currentValue === '' || currentValue.includes('.') === false) {
                document.getElementById('display').value += '.';
            }
        }

        function calculate() {
            let expression = document.getElementById('display').value;
            try {
                let result = eval(expression);
                document.getElementById('display').value = result;
            } catch (error) {
                document.getElementById('display').value = 'Error';
            }
        }

        function clearDisplay() {
            document.getElementById('display').value = '';
        }
    </script>
</body>
</html>