Asked 4 months ago
2
116
I wanna know what is the difference between returning Error and throwing Error in functions.
How each of them perform and affect the program?
Asked 4 months ago
2
116
I wanna know what is the difference between returning Error and throwing Error in functions.
How each of them perform and affect the program?
2
0
0
0
return and throwWhen it comes to handling errors in functions, developers often wonder what's the difference between returning an error and throwing an error. Let's dive into the details.
When you use return to return an error, it simply exits the function and returns the error value to the caller. The function execution is terminated, and the program flow is interrupted.
Example:
In this case, if sth is falsy, the function will return an error with the message "Error". The function execution will stop, and the error will be propagated up the call stack.
When you use throw to throw an error, it also interrupts the function execution, but it does so in a more drastic way. The error is propagated up the call stack, and the program will terminate immediately, unless caught by a try-catch block.
Example:
In this case, if sth is falsy, the function will throw an error with the message "Error". The error will be propagated up the call stack, and if not caught, the program will terminate.
Here are the key differences between returning an error and throwing an error:
try-catch block, allowing the program to continue execution.In summary, returning an error is a more controlled way to handle errors, while throwing an error is a more drastic way to handle errors. Choose the approach that best fits your use case.
return and throwWhen it comes to handling errors in functions, developers often wonder what's the difference between returning an error and throwing an error. Let's dive into the details.
When you use return to return an error, it simply exits the function and returns the error value to the caller. The function execution is terminated, and the program flow is interrupted.
Example:
In this case, if sth is falsy, the function will return an error with the message "Error". The function execution will stop, and the error will be propagated up the call stack.
When you use throw to throw an error, it also interrupts the function execution, but it does so in a more drastic way. The error is propagated up the call stack, and the program will terminate immediately, unless caught by a try-catch block.
Example:
In this case, if sth is falsy, the function will throw an error with the message "Error". The error will be propagated up the call stack, and if not caught, the program will terminate.
Here are the key differences between returning an error and throwing an error:
try-catch block, allowing the program to continue execution.In summary, returning an error is a more controlled way to handle errors, while throwing an error is a more drastic way to handle errors. Choose the approach that best fits your use case.