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calc.html
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<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="style1.css">
<title>Calculator</title>
</head>
<body>
<div class="cont">
<div class="calc">
<h1>SHIVNATH</h1>
<h2>TATHE</h2>
<input type="text" placeholder="0" id="outputSCR">
<button onclick="Clear()">CLR</button>
<button onclick="del()">DLT</button>
<button onclick="display('%')">%</button>
<button onclick="display('/')">/</button>
<button onclick="display('7')">7</button>
<button onclick="display('8')">8</button>
<button onclick="display('9')">9</button>
<button onclick="display('*')">*</button>
<button onclick="display('4')">4</button>
<button onclick="display('5')">5</button>
<button onclick="display('6')">6</button>
<button onclick="display('-')">-</button>
<button onclick="display('1')">1</button>
<button onclick="display('2')">2</button>
<button onclick="display('3')">3</button>
<button onclick="display('+')">+</button>
<button onclick="display('.')">.</button>
<button onclick="display('0')">0</button>
<button onclick="cal()" class="call">=</button>
</div>
</div>
<script>
let output = document.getElementById("outputSCR");
function display(num){
output.value += num;
}
function cal(){
try{
output.value = eval(output.value)
}
catch(err)
{
alert("Invalid Number !!")
}
}
function Clear(){
output.value = "";
}
function del(){
output.value = output.value.slice(0,-1);
}
</script>
</body>
</html>