Poikkeuskäsittely

Poikkeuskäsittely, or exception handling, is a fundamental programming concept used to manage runtime errors or unexpected situations that disrupt the normal flow of a program's execution. When such an event occurs, it is called an exception. Instead of crashing the program, exception handling provides a structured way to detect, report, and respond to these exceptions.

The core of exception handling involves mechanisms like try, catch, and finally blocks. A try block encloses the code that might potentially raise an exception. If an exception occurs within the try block, the program's control is transferred to a corresponding catch block. The catch block is designed to handle specific types of exceptions, allowing for tailored responses. For example, a catch block might log the error, display a user-friendly message, or attempt to recover from the error by retrying an operation.

A finally block, often used in conjunction with try and catch, contains code that will be executed regardless of whether an exception was thrown or caught. This is typically used for cleanup operations, such as closing files or releasing resources, ensuring that these actions are always performed.

The primary benefits of exception handling include increased program robustness, improved error reporting, and cleaner code. By separating error handling logic from the main program flow, developers can write more maintainable and reliable software. Different programming languages offer varying syntaxes and features for exception handling, but the underlying principle of managing exceptional events remains consistent.