JavaScript/Array6.html at main · sudeepnagar/JavaScript · GitHub

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<h3> demo on for in loop and for of loop(new features came in ECMA script(js6))</h3>
  <script>

	 let a=[11,22,33];
	 for(let i in a){
	    document.write(`${i}=> ${a[i]}<br>`);
		a[i]+=5;

	 }

	 let b=[44,5,66,88,45];
	 for(let e of b){
	    document.write(`${e}<br>`);

	 }

	 let str='welcome';
	 for(let c of str)
	 {
		document.write(`${c}<br>`);
	 }
	  for(let c in str)
	 {
		document.write(`${c} => ${str[c]}<br>`);
	 }


  </script>
  <!-- for (old)
       for in =>  for(tempvar in arr/coll)  fetching one by one index
	               {
				      statements
				   }
	   for of =>
	             for(tempvar of arr/coll)   fetching one by one value(element)
				 {
				    statements
				 }