The Ultimate Guide to Python Programming With Python 3.10 - if Statements

The video tutorial covers handling Python tracebacks and key errors, focusing on a scenario where a non-existent key is accessed in a dictionary. It introduces the use of if statements to implement conditional logic, demonstrating how to safeguard applications against errors. The tutorial culminates in building a simple phone book application that uses if-else logic to handle missing entries gracefully, ensuring the program doesn't crash and provides user-friendly messages instead.

What error is raised when trying to access a non-existent key in a Python dictionary?

• ValueError

• IndexError

• TypeError

• KeyError

Which keyword is used in Python to check a condition and execute a block of code if the condition is true?

• while

• for

• if

• switch

What is the purpose of the colon (:) in an if statement in Python?

• To separate conditions

• To start a block of code

• To end the statement

• To indicate a comment

What happens if the condition in an if statement evaluates to false and there is no else statement?

• The program crashes

• The next line of code is executed

• An error is raised

• The block of code is skipped

Which keyword is used to execute a block of code when the if condition is false?

• finally

• except

• else

• elif

In the phone book application, what message is displayed if a client is not found in the dictionary?

• Client not found

• Error: Client missing

• No such client

• Client does not exist

What operator is used to check if a key exists in a dictionary in Python?

• ==

• in

• exists

• contains