JavaScript/funs2.html at main · sudeepnagar/JavaScript · GitHub

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<!DOCTYPE html>
<html lang="em">
<head>
      <script src="exprfuns.js"></script>
</head>
<body>
  <h3>demo on expr functions</h3>
     <script>

		document.write(`${add}<br>`);
		document.write(`${add(10,20)}<br>`);
		document.write(`${product(15,9)}<br>`);

		const eles=[6,100,23,80,505];

		//callback or extending the functionality
		eles.forEach(
		              function(e){
					  console.log(`EF`);
					  document.writeln(`${e} `);
					  }
					  );

      let s=0;
	    eles.forEach(
		              function(e){
					   s+=e;
					  }
		             );

					 document.write(`<br>sum of eles: ${s}`);

          //callback
		eles.sort(function(i,j){
		                       console.log(`sort`);
							   return i-j;//ascending
		              }
					  );
          document.write(`<br>sorted arr: ${eles}`);

        //callback
        eles.sort(function(i,j){
		                       console.log(`sort`);
							   return j-i;//decending
		              }
					  );
          document.write(`<br>sorted arr: ${eles}<br>`);


		</script>

		<button id="bt">Click here</button>

		<script>

		  bt.onclick=function(){
		                         alert("button onclicked");
								}

		</script>
</body>
</html>