Error Handling

To write robust programs that resist common user errors and other issues in the usage context, you must endeavor to find and handle all potential errors. In most cases, validating input arguments takes the lion’s share of this work, but this is not always enough.

There might be issues that cannot be checked in advance, and you’ll observe the error only after an operation has been invoked. Most modern programing languages contain exception handling mechanism to cope with this situation.

The try-catch construct