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index.html
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<html>
<head>
<script>
function display(val) {
document.getElementById("result").value += val;
}
function calcculate() {
var str = document.getElementById("result").value;
var ans = eval(str);
document.getElementById("result").value = ans;
}
function clear_screen() {
document.getElementById("result").value = "";
}
</script>
<!---style starts here..........-->
<style>
body{
font-size: 2rem;
}
td{
height: 2rem;
width: 2rem;
}
td > input{
padding: 50px;
}
.Title {
margin-bottom: 10px;
text-align: center;
width: 30vw;
color: rgb(238, 20, 20);
border: solid black 2px;
}
input[type="button"] {
background-color: green;
color: rgba(245, 241, 23, 0.966);
border: solid black 2px;
width: 100%
}
input[type="text"] {
background-color: white;
border: solid black 2px;
width: 100%
}
.m_body {
height: 100vh;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
background-position: center;
background-repeat: no-repeat;
}
input:hover {
background-color: white;
color: black;
}
table {
/* height: 70%;
width: 70%; */
border-radius: 10px;
border: 5px solid black;
}
#result{
font-size: 2rem;
}
</style>
</head>
<body>
<div class="m_body">
<div class="Title">
Calculator
</div>
<table>
<tr>
<td colspan="3"><input type="text" id="result" /></td>
<td> <input type="button" value="c" onclick="clear_screen()" /> </td>
</tr>
<tr>
<td><input type="button" value="1" onclick="display('1')" /> </td>
<td><input type="button" value="2" onclick="display('2')" /> </td>
<td><input type="button" value="3" onclick="display('3')" /> </td>
<td><input type="button" value="/" onclick="display('/')" /> </td>
</tr>
<tr>
<td><input type="button" value="4" onclick="display('4')" /> </td>
<td><input type="button" value="5" onclick="display('5')" /> </td>
<td><input type="button" value="6" onclick="display('6')" /> </td>
<td><input type="button" value="-" onclick="display('-')" /> </td>
</tr>
<tr>
<td><input type="button" value="7" onclick="display('7')" /> </td>
<td><input type="button" value="8" onclick="display('8')" /> </td>
<td><input type="button" value="9" onclick="display('9')" /> </td>
<td><input type="button" value="+" onclick="display('+')" /> </td>
</tr>
<tr>
<td><input type="button" value="." onclick="display('.')" /> </td>
<td><input type="button" value="0" onclick="display('0')" /> </td>
<td><input type="button" value="=" onclick="calcculate()" /> </td>
<td><input type="button" value="*" onclick="display('*')" /> </td>
</tr>
</table>
</div>
</body>
</html>