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<html>			<!--called root tag-->
	<head>		<!--it is used for meta tags-->
		<title><!-- it is used for title of page-->
			HTMl with picture tag
		</title>
	</head>
	<body><!--it is a container-->	
		<!--tag to display different picture-->
		<!--that fits best to the browser-->
		<!--the picture is chosen by the browser depending upon
			the device or view.
		-->
  		<picture>
  			<!-- we are using two pictures-->
  			<!--which one to chose, it is decided by browser-->
  			<!--depending upon device or view-->
  			<source srcset="coffee.jpg">
  			<source srcset="glass.jpg">
  			<!--we use <img src...>at the end because
  				if none of the src matched or
  				if the browser does not support <picture> tag.
  				then browser uses picture  with this im src.
  			-->
  		<img src="picture.jpg" alt="Beatles" style="width:auto;">
		</picture>
	<!--img src is used to insert image-->
	<!-- it has attributes width,height and alt-->
	<!-- 'alt' is used if the picture could not be loaded/displayed-->
	<!--we must make sure that the path(of image) is correct-->
	<!--it repeats the picture-->
	<!-- to avoid it we use css.We will learn in css unit-->
	</body>
</html>
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note: please store the picture in same folder as that html is.
To understand clearly, read the comment section.
