function in ngfor angular code example

Example 1: ngfor index

<ul>
    <li *ngFor="let item of items; let i = index" [attr.data-index]="i">
        {{item}}
    </li>
</ul>

Example 2: angular for loop

let array = [1,2,3];
for (let i = 0; i < array.length; i++) {
  console.log(array[i]);
}