1) Sequence and Flowcharts

• UiPath recommends that the first part of the Robot should start with Flowchart or Sequence.
• We can nest Sequence inside Sequence, Flowchart inside Sequence, Sequence inside Flowchart
• Even though Flowchart is recommended as start option, exception handling is also necessary. Where we add Try Catch block and place Flowchart inside it.

Exception Handling:

Try- Catch is an activity which contains 3 blocks

1) Try 

2) Catch

3) Finally

We Try something, catch exception and act accordingly. Finally block will always execute

Inside Try block we can drag and add- Sequences, Flowcharts & Activities etc

Note: It is better to add Flowchart in Try Block and Proceed.