Modern JavaScript from the Beginning - Second Edition - Try...Catch Statements

What is the primary reason for using try-catch with async-await in JavaScript?

• To make the code run faster

• To simplify the syntax of async functions

• To handle errors without using .then and .catch

• To avoid using promises

In the context of try-catch, what does the 'catch' block do?

• It executes code when there is no error

• It catches and handles errors that occur in the 'try' block

• It logs the error to the console

• It prevents the code from running

When should you use try-catch blocks in your code?

• Whenever you write any JavaScript code

• Only when you are sure there will be no errors

• When performing operations that might fail, like API requests

• To replace all if-else statements

What is the purpose of throwing custom errors in JavaScript?

• To provide specific error messages for certain conditions

• To stop the execution of the program

• To avoid using try-catch blocks

• To make the code more complex

In the example provided, what happens if a string is passed to the 'double' function?

• The function returns the string doubled

• The function throws an error indicating the input is not a number

• The function returns null

• The function logs the string to the console