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index.html
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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Calculator</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class="container">
<div class="calc">
<form name="calculator">
<input type="text" id="display" placeholder="0" readonly>
<br>
<input id="btn" type="button" value="7" onclick= "calculator.display.value+='7'">
<input id="btn" type="button" value="8" onclick="calculator.display.value +='8'">
<input id="btn" type="button" value="9" onclick="calculator.display.value +='9'">
<input id="btn" class="math" type="button" value="+" onclick="calculator.display.value +='+'">
<br>
<input id="btn" type="button" value="4" onclick="calculator.display.value +='4'">
<input id="btn" type="button" value="5" onclick="calculator.display.value +='5'">
<input id="btn" type="button" value="6" onclick="calculator.display.value +='6'">
<input id="btn" class="math" type="button" value="-" onclick="calculator.display.value +='-'">
<br>
<input id="btn" type="button" value="1" onclick="calculator.display.value +='1'">
<input id="btn" type="button" value="2" onclick="calculator.display.value +='2'">
<input id="btn" type="button" value="3" onclick="calculator.display.value +='3'">
<input id="btn" class="math" type="button" value="X" onclick="calculator.display.value +='*'">
<br>
<input id="btn" class="clear" type="button" value="C" onclick="calculator.display.value =''">
<input id="btn" type="button" value="0" onclick="calculator.display.value +='0'">
<input id="btn" class="math"type="button" value="=" onclick="calculator.display.value = eval(calculator.display.value)">
<input id="btn" class="math" type="button" value="/" onclick="calculator.display.value +='/'">
</form>
</div>
</div>
</body>
</html>