Introduction
Lately, while working on a new project, I had a chance to think about the proper way to handle control flow. As all developers might know well, the most common approaches used are try-catch and if-else. So far, I haven't thought deeply about the difference between these two. From time to time, I think I mainly adopted a more concise way of writing code. Stability was significant on this project, applying the appropriate control flow processing approach was one of the keys. For this reason, I wrote pseudocode based on the scenario for these two approaches and compared them, and I'd like to share the result with this community.
Scenario
Suppose that the signup logic of the virtual Web service 'A' is not allowed to have duplicate nicknames, e-mails, and phones.