*ngFor having flexibility to identify the odd or even rows.
Examples
<div *ngFor="let user of users;
let index =index;
let isOdd=odd;
let isEven=even"
[class.odd]="isOdd"
[class.even]="isEven"
[class.selected]="user=== selectedUser">
<p>{{user.name}}</p>
</div>