Local variables in templates

Let us see the example of using local variables in ng-repeat and ngFor in AngularJS and Angular, respectively.

AngularJS:

<tr ng-repeat="book in vm.books"> 
  <td>{{book.name}}</td> 
</tr> 

Angular:

<tr *ngFor="let book of books"> 
  <td>{{book.name}}</td> 
</tr> 

Notice that the local variable book is implicitly declared in AngularJS and in Angular the let keyword is used to define the local variable book.