Chapter 5

Question 1

boolean function

Answer 1

A function that returns a boolean value.

Question 2

composition (of functions)

Answer 2

Calling one function from within the body of another, or using the return value of one function as an argument to the call of another.

Question 3

dead code

Answer 3

Part of a program that can never be executed, often because it appears after a return stateme

Question 4

fruitful function

Answer 4

A function that yields a return value.

Question 5

incremental development

Answer 5

A program development plan intended to avoid debugging by adding and testing only a small amount of code at a time.

Question 6

None

Answer 6

A special Python value returned by functions that have no return statement, or a return statement without an argument. None is the only value of the type, NoneType.

Question 7

return value

Answer 7

The value provided as the result of a function call.

Question 8

scaffolding

Answer 8

Code that is used during program development but is not part of the final version.

Question 9

temporary variable

Answer 9

A variable used to store an intermediate value in a complex calculation.

Question 10

unit testing

Answer 10

An automatic procedure used to validate that individual units of code are working properly. Python has doctest built in for this purpose.