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thinkswellthinkswell
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Merge pull request #1179 from yashpokharna2555/calculator-add-validation
Add the validation for 0 and '+' operator
2 parents 27fc4a1 + 188c3fd commit 31973d6

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‎Calculator/yash_pokharna/index.html‎

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Calculator</title>
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<link rel="stylesheet" href="styles.css">
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</head>
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<body>
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<div class="calculator">
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<input type="text" id="display" readonly>
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<div class="buttons">
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<button onclick="clearDisplay()">C</button>
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<button onclick="addOperator('/')">/</button>
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<button onclick="addOperator('*')">*</button>
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<button onclick="deleteLast()">DEL</button><br>
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<button onclick="appendNumber('7')">7</button>
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<button onclick="appendNumber('8')">8</button>
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<button onclick="appendNumber('9')">9</button>
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<button onclick="addOperator('-')">-</button><br>
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<button onclick="appendNumber('4')">4</button>
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<button onclick="appendNumber('5')">5</button>
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<button onclick="appendNumber('6')">6</button>
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<button onclick="addOperator('+')">+</button><br>
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<button onclick="appendNumber('1')">1</button>
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<button onclick="appendNumber('2')">2</button>
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<button onclick="appendNumber('3')">3</button>
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<button onclick="calculate()">=</button><br>
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<button onclick="appendNumber('0')">0</button>
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<button onclick="appendNumber('.')">.</button>
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</div>
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</div>
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<script src="script.js"></script>
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</body>
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</html>

‎Calculator/yash_pokharna/script.js‎

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let display = document.getElementById("display");
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function clearDisplay() {
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display.value = "";
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}
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function deleteLast() {
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display.value = display.value.slice(0, -1);
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}
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function appendNumber(number) {
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if (number === '.' && display.value.includes('.') && !isNaN(display.value.slice(-1))) {
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alert("Error: Multiple decimal points are not allowed.");
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return;
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}
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display.value += number;
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}
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function addOperator(operator) {
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const lastChar = display.value.slice(-1);
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if (!display.value || isNaN(lastChar)) {
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alert("Error: Cannot add consecutive operators.");
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return;
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}
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display.value += operator;
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}
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function calculate() {
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try {
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if (display.value.includes("/0")) {
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alert("Error: Division by zero is undefined.");
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return;
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}
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display.value = eval(display.value);
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} catch (error) {
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alert("Error: Invalid operation.");
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}
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}

‎Calculator/yash_pokharna/style.css‎

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body {
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font-family: Arial, sans-serif;
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display: flex;
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justify-content: center;
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align-items: center;
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height: 100vh;
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margin: 0;
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background-color: #f5f5f5;
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}
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.calculator {
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background: #fff;
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padding: 20px;
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border-radius: 10px;
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box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
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}
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#display {
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width: 100%;
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height: 50px;
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font-size: 18px;
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margin-bottom: 10px;
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text-align: right;
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padding: 5px;
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border: 1px solid #ccc;
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border-radius: 5px;
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background: #f9f9f9;
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}
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.buttons {
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display: grid;
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grid-template-columns: repeat(4, 1fr);
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gap: 10px;
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}
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button {
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height: 50px;
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font-size: 18px;
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border: none;
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border-radius: 5px;
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cursor: pointer;
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background: #007BFF;
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color: white;
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}
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button:hover {
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background: #0056b3;
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}
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button:active {
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background: #003f7f;
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}

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