Swift Defer. Clean up before you leave.

This article explains the Swift defer keyword, which schedules a block of code to run at the end of the current scope. It covers the concept of scopes in Swift, demonstrates where defer blocks execute with examples, and highlights practical use cases like cleaning up temporary files or releasing resources. The article emphasizes that defer is useful for ensuring cleanup actions occur even when early returns or errors happen, improving code safety. It is a technical tutorial aimed at Swift developers.