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basic.html
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basic.html
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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>basic calculator</title>
<link rel="stylesheet" href="basic.css">
</head>
<body>
<div class="calculator">
<input type="text" id="output" readonly >
<div class="buttons">
<button onclick="appendValue('7')">7</button>
<button onclick="appendValue('8')">8</button>
<button onclick="appendValue('9')">9</button>
<button class="operator" onclick="appendValue('/')">/</button>
<button onclick="appendValue('4')">4</button>
<button onclick="appendValue('5')">5</button>
<button onclick="appendValue('6')">6</button>
<button class="operator" onclick="appendValue('*')">*</button>
<button onclick="appendValue('1')">1</button>
<button onclick="appendValue('2')">2</button>
<button onclick="appendValue('3')">3</button>
<button class="operator" onclick="appendValue('-')">-</button>
<button onclick="appendValue('0')">0</button>
<button onclick="appendValue('.')">.</button>
<button class="operator" onclick="appendValue('+')">+</button>
<button class="operators" onclick="calculate()">=</button>
</div>
</div>
<script src="basic.js"></script>
</body>
</html>