What are the symbols used in one way and two ways data binding?

Two-way data binding is a feature provided by the angular framework using which the view and model of an MVC application are in sync all the time i.e. change in view updates model and vice versa. To achieve two-way data binding “ng-model” directive is used. By default, ng-model provides the two-way data model functionality. In order to achieve one-way data binding, ng-model can be used in below fashion: ng-model=”::object.value”