Podcast
Questions and Answers
Which of the following statements about the scope of a variable is true?
Which of the following statements about the scope of a variable is true?
What is the purpose of the finally block in exception handling?
What is the purpose of the finally block in exception handling?
What happens when a function is called with a non-default parameter value?
What happens when a function is called with a non-default parameter value?
What is the difference between a function's arguments and parameters?
What is the difference between a function's arguments and parameters?
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What happens when a function encounters a return statement?
What happens when a function encounters a return statement?
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What is the primary reason for using default parameters in a function?
What is the primary reason for using default parameters in a function?
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Which of the following is a characteristic of a built-in function?
Which of the following is a characteristic of a built-in function?
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What happens to the flow of execution when a function encounters an exception?
What happens to the flow of execution when a function encounters an exception?
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What is the scope of a variable defined inside a function?
What is the scope of a variable defined inside a function?
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What is the purpose of the try block in exception handling?
What is the purpose of the try block in exception handling?
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Study Notes
Functions
- There are three types of functions: built-in functions, functions defined in a module, and user-defined functions
- Built-in functions are pre-defined in Python and can be used directly
- Functions defined in a module are imported from external libraries
- User-defined functions are created by the programmer to perform specific tasks
- A user-defined function can be created using the
defkeyword - Functions can take arguments and parameters, which are values passed to the function when it is called
- Default parameters are assigned a value in the function definition, but can be overridden when the function is called
- Positional parameters are assigned a value based on their position in the function call
Function Execution and Scope
- The flow of execution is the order in which Python executes the code in a program
- When a function is called, the flow of execution jumps to the function and then returns to the point where the function was called
- Variables have scope, which determines where they can be accessed
- Global scope variables can be accessed from anywhere in the program
- Local scope variables are limited to the block of code where they are defined
Exception Handling
- Exception handling is a way to handle errors that occur during program execution
- The
tryblock contains the code that might raise an exception - The
exceptblock contains the code that handles the exception - The
finallyblock contains the code that is executed regardless of whether an exception was raised - Using
try-except-finallyblocks, programmers can anticipate and handle potential errors, making the program more robust and reliable
Functions
- There are three types of functions: built-in functions, functions defined in a module, and user-defined functions
- Built-in functions are pre-defined in Python and can be used directly
- Functions defined in a module are imported from external libraries
- User-defined functions are created by the programmer to perform specific tasks
- A user-defined function can be created using the
defkeyword - Functions can take arguments and parameters, which are values passed to the function when it is called
- Default parameters are assigned a value in the function definition, but can be overridden when the function is called
- Positional parameters are assigned a value based on their position in the function call
Function Execution and Scope
- The flow of execution is the order in which Python executes the code in a program
- When a function is called, the flow of execution jumps to the function and then returns to the point where the function was called
- Variables have scope, which determines where they can be accessed
- Global scope variables can be accessed from anywhere in the program
- Local scope variables are limited to the block of code where they are defined
Exception Handling
- Exception handling is a way to handle errors that occur during program execution
- The
tryblock contains the code that might raise an exception - The
exceptblock contains the code that handles the exception - The
finallyblock contains the code that is executed regardless of whether an exception was raised - Using
try-except-finallyblocks, programmers can anticipate and handle potential errors, making the program more robust and reliable
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Description
Learn about the different types of functions in Python, including built-in, module-defined, and user-defined functions. Understand how to create and use functions with arguments and parameters.
