I have series of methods which are dependent on completion of other methods.

process1(data: string) : Observable<string> {

   this.dataservice.process(data).subscribe(

            (response) => {

                return response.data;

            }

        );

}



main(data: string) : string {



   var process1Data: string = process1(data); 



   // I would like to wait for process1 method to complete before running process2

   // I do not want to include process2 inside subscribe of process1 because I have to make few more method calls

   var process2Data: string = process2(process1Data);



   var process3Data: string = process3(process2Data);



   ...



}

How can I wait for an observable to complete before calling next method (process2, process3)? (similar like await in c#)