When an error happens in JavaScript, the program normally stops running.
This can break your application and confuse users.
To prevent this, JavaScript provides try, catch, and finally blocks.
They allow you to handle errors safely and keep your program running smoothly.
Using try and catch is a professional way to manage unexpected problems in real-world applications.
How try, catch, and finally Work
try
- Wraps code that may cause an error
catch
- Runs when an error happens in try
finally
- Runs every time (error or no error)
These blocks help you control what happens when something goes wrong.
Here, the code inside try causes an error.
Instead of crashing the program, the error is caught and handled in the catch block.
The finally block runs whether an error happens or not.
It is often used to clean up resources or show final messages.
These examples show how try, catch, and finally protect your program from crashing.
By mastering these blocks, students gain the ability to handle errors confidently and build stable, professional JavaScript applications.