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A calculator

Written by

admin

in

,

<!DOCTYPE html>

<html lang="en">
<head>
<meta charset="UTF-8">
<title>Calculator</title>
<style>
body {
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
      background: #1e1e2f;
      font-family: Arial, sans-serif;
    }

    .calculator {
      background: #2c2c3e;
      padding: 20px;
      border-radius: 15px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    }

    .display {
      width: 100%;
      height: 60px;
      margin-bottom: 15px;
      text-align: right;
      padding: 10px;
      font-size: 24px;
      border: none;
      border-radius: 10px;
      background: #000;
      color: #0f0;
    }

    .buttons {
      display: grid;
      grid-template-columns: repeat(4, 70px);
      gap: 10px;
    }

button {
      height: 60px;
      font-size: 18px;
      border: none;
      border-radius: 10px;
      cursor: pointer;
      background: #3e3e55;
      color: white;
      transition: 0.2s;
    }

button:hover {
      background: #57577a;
    }

    .operator {
      background: #ff9500;
    }

    .equal {
      background: #28a745;
      grid-column: span 2;
    }

    .clear {
      background: #dc3545;
      grid-column: span 2;
    }
</style>
</head>
<body>

<div class="calculator">
<input type="text" id="display" class="display" disabled>

<div class="buttons">
<button onclick="clearDisplay()" class="clear">C</button>
<button onclick="append('/')"></button>
<button onclick="append('*')"></button>

<button onclick="append('7')">7</button>
<button onclick="append('8')">8</button>
<button onclick="append('9')">9</button>
<button onclick="append('-')" class="operator">-</button>

<button onclick="append('4')">4</button>
<button onclick="append('5')">5</button>
<button onclick="append('6')">6</button>
<button onclick="append('+')" class="operator">+</button>

<button onclick="append('1')">1</button>
<button onclick="append('2')">2</button>
<button onclick="append('3')">3</button>
<button onclick="calculate()" class="equal">=</button>

<button onclick="append('0')">0</button>
<button onclick="append('.')">.</button>
</div>
</div>

<script>
let display = document.getElementById("display");

function append(value) {
display.value += value;
  }

function clearDisplay() {
display.value = "";
  }

function calculate() {
try {
display.value = eval(display.value);
    } catch {
display.value = "Error";
    }
  }
</script>

</body>
</html>
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