Explain catching exceptions using try and except block.
The try block is used to enclose suspicious lines of code where exceptions might occur during program execution. Every try block is followed by an except block that contains the appropriate code to handle the possible exceptions.
While executing the program, if an exception is encountered in the try block, further execution of the code inside the try block is stopped and the control is transferred to the except block. We can have multiple except blocks for a single try block to handle different types of exceptions. When an exception is raised, a search for the matching except block is made till it is handled. An except clause without specifying any exception can be added as the last clause to handle any unhandled exceptions.
Explanation
The textbook explains that suspicious code is placed inside a try block, followed by except blocks containing handlers for possible exceptions. On encountering an exception, control transfers from try to the matching except block. Multiple except blocks can handle different exceptions, and a generic except clause (without exception name) can catch any unhandled exceptions.