<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
İŞTE KOD
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>JavaScript Projects</title>
<meta ID="description" content="">
<meta ID="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
<style>
#output {
height: 45px;
background-color: black;
color: aqua;
width: 100%;
font-size: 2em;
padding: 5px;
text-align: right;
margin-bottom: 25px;
overflow: hidden;
}
#mycalcu {
width: 350px;
background-color: dimgray;
height: 350px;
padding: 5px;
}
.cbutton {
font-size: 2em;
width: 40px;
