What is the purpose of try-catch-finally in programming?

Can you explain what try-catch-finally does in programming?

Sure! The try-catch-finally construct is used for error handling in many programming languages. The 'try' block contains code that might throw an error, the 'catch' block handles the error if it occurs, and the 'finally' block executes code after the try and catch blocks, regardless of whether an error occurred.

Why is the finally block important?

The finally block is important because it ensures that certain code runs no matter what, such as closing resources or cleaning up. This is crucial for preventing resource leaks.

Can you give me an example of how to use it?

Certainly! Here's a simple example in JavaScript:

try {
    // Code that may throw an error
    let result = riskyFunction();
} catch (error) {
    console.error('Error occurred:', error);
} finally {
    console.log('This will run regardless of the outcome.');
}

What happens if there's no catch block?

If there's no catch block and an error occurs in the try block, the error will propagate up the call stack, potentially crashing the program or leading to unhandled exceptions.