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HTML

              
                <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
<style type="text/css">
    .bs-example{
    	margin: 20px;
    }
</style>
</head>
<body>
<div class="bs-example">
    <div class="panel-group" id="accordion">
        <div class="panel panel-default">
            <div class="panel-heading">
                <h4 class="panel-title">
                    <a data-toggle="collapse" data-parent="#accordion" href="#collapseOne">1. What is HTML?</a>
                </h4>
            </div>
            <div id="collapseOne" class="panel-collapse collapse in">
                <div class="panel-body">
                    <p>HTML stands for HyperText Markup Language. HTML is the main markup language for describing the structure of Web pages. <a href="http://www.tutorialrepublic.com/html-tutorial/" target="_blank">Learn more.</a></p>
                </div>
            </div>
        </div>
      
        <div class="panel panel-default">
            <div class="panel-heading">
                <h4 class="panel-title">
                    <a data-toggle="collapse" data-parent="#accordion" href="#collapseTwo">2. What is Bootstrap?</a>
                </h4>
            </div>
            <div id="collapseTwo" class="panel-collapse collapse">
                <div class="panel-body">
                    <p>Bootstrap is a powerful front-end framework for faster and easier web development. It is a collection of CSS and HTML conventions. <a href="http://www.tutorialrepublic.com/twitter-bootstrap-tutorial/" target="_blank">Learn more.</a></p>
                </div>
            </div>
        </div>
        <div class="panel panel-default">
            <div class="panel-heading">
                <h4 class="panel-title">
                    <a data-toggle="collapse" data-parent="#accordion" href="#collapseThree">3. What is CSS?</a>
                </h4>
            </div>
            <div id="collapseThree" class="panel-collapse collapse">
                <div class="panel-body">
                    <p>CSS stands for Cascading Style Sheet. CSS allows you to specify various style properties for a given HTML element such as colors, backgrounds, fonts etc. <a href="http://www.tutorialrepublic.com/css-tutorial/" target="_blank">Learn more.</a></p>
                </div>
            </div>
        </div>
      <div class="panel panel-default">
            <div class="panel-heading">
                <h4 class="panel-title">
                    <a data-toggle="collapse" data-parent="#accordion" href="#collapseFour">1.1 Added for tab collapse?</a>
                </h4>
            </div>
            <div id="collapseFour" class="panel-collapse collapse">
                <div class="panel-body">
                    <p>HTML stands for HyperText Markup Language. HTML is the main markup language for describing the structure of Web pages.HTML stands for HyperText Markup Language. HTML is the main markup language for describing the structure of Web pages.HTML stands for HyperText Markup Language. HTML is the main markup language for describing the structure of Web pages.HTML stands for HyperText Markup Language. HTML is the main markup language for describing the structure of Web pages.HTML stands for HyperText Markup Language. HTML is the main markup language for describing the structure of Web pages.HTML stands for HyperText Markup Language. HTML is the main markup language for describing the structure of Web pages.HTML stands for HyperText Markup Language. HTML is the main markup language for describing the structure of Web pages.HTML stands for HyperText Markup Language. HTML is the main markup language for describing the structure of Web pages.HTML stands for HyperText Markup Language. HTML is the main markup language for describing the structure of Web pages.HTML stands for HyperText Markup Language. HTML is the main markup language for describing the structure of Web pages.HTML stands for HyperText Markup Language. HTML is the main markup language for describing the structure of Web pages.HTML stands for HyperText Markup Language. HTML is the main markup language for describing the structure of Web pages.HTML stands for HyperText Markup Language. HTML is the main markup language for describing the structure of Web pages.HTML stands for HyperText Markup Language. HTML is the main markup language for describing the structure of Web pages.HTML stands for HyperText Markup Language. HTML is the main markup language for describing the structure of Web pages. </p>
                </div>
            </div>
        </div>
    </div>
	<p><strong>Note:</strong> Click on the linked heading text to expand or collapse accordion panels.</p>
</div>
</body>
              
            
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