Javascript Finally

Javascript finally

Created By: chatGPT

Finally is a block in JavaScript that is associated with try-catch statements. It executes code after the try and catch blocks, regardless of whether an error was thrown or caught. This is useful for code that must run regardless of success or failure, such as cleanup operations or closing resources.

try {
    // Code that may throw an error
    let result = riskyFunction();
    console.log(result);
} catch (error) {
    // Handling error
    console.error('An error occurred:', error);
} finally {
    // This block runs regardless of the outcome
    console.log('Cleanup operations here.');
}

In the example above, the finally block will always execute, even if the riskyFunction() throws an error. This guarantees that the cleanup operations, such as releasing resources or logging, happen consistently.

function riskyFunction() {
    throw new Error('Something went wrong!');
}

It’s important to note that if the try block contains a return statement, the finally block will still execute before the function returns the value. This means you can perform cleanups even when returning values.

function example() {
    try {
        return 'Result'; // This will be returned
    } catch (error) {
        console.error('Error:', error);
    } finally {
        console.log('This will always run.');
    }
}