I want to set a default option value for select tag, the values are declared as table in my component and showed with ngFor directive : 

```
<form>
    <div class="form-group col-4">
      <span class="badge badge-theme mb-3">Quantité</span>
      <select class="form-control" id="exampleFormControlSelect1">
        <option *ngFor="let quantity of Quantities" [ngValue]="quantity">{{quantity}}</option>
      </select>
    </div>
    <div class="form-group col-4">
      <span class="badge badge-theme mb-3">Message personnalisé</span>
      <textarea class="form-control" id="exampleFormControlTextarea1" rows="3"></textarea>
    </div>
  </form>

```

**components.ts**

```
  Quantities = Array(50).fill(0).map((x,i)=>i);

```