Gracefully handle runtime errors using the try-catch-finally block.
The `try...catch...finally` statement provides a structured mechanism for handling exceptions (runtime errors) in JavaScript. It allows you to anticipate and manage errors without having the entire script halt execution. The `try` block contains the code that you suspect might throw an error. If any statement within the `try` block (or a function called from within it) throws an exception, control immediately transfers to the `catch` block. The `catch` block is where you handle the error. It receives an error object as an argument, which typically contains useful information like the error `message` and `stack` trace. Here, you can log the error, display a user-friendly message, or attempt a recovery. If no error occurs in the `try` block, the `catch` block is skipped entirely. The optional `finally` block is unique because its code is executed *after* the `try` and `catch` blocks have completed, regardless of whether an error was thrown or caught. This makes it the ideal place for cleanup code, such as closing a file, releasing a network connection, or clearing a resource, ensuring that these critical actions happen no matter the outcome of the `try` block. This structure is fundamental for writing resilient code that can recover from unexpected situations.