Read here: https://www.concretepage.com/angular-...
FormControl
It is a class that is used to get and set values and validation of a form control such as input and select tag.
FormGroup
It has the role to track value and validity state of group of FormControl.
FormGroup
https://www.concretepage.com/angular-...
FormBuilder
https://www.concretepage.com/angular-...
FormControl setValue
https://www.concretepage.com/angular/...
Add and Remove Validators Dynamically
https://www.concretepage.com/angular/...