Name it once, call it anywhere

Computing · Programming · ages 15-16

Name ______________________ Date ____________

For sayHello(person), what does the parameter let a caller do?
- Supply a value for the body's named input
- Choose a new function name whenever it is called
- Skip the function body whenever it supplies a value
What does defining a procedure give you?
- A promise that every call runs faster
- A guarantee that the program has no bugs
- A reusable pack of steps under one name
For the ordinary functions shown here, defining a function stores its body without running it. Calling the function runs that body.
Circle one: True False
reportGrade computes score as (numCorrect / 30) * 100. What score does a student earn with 18 correct answers?
Answer: ______________
offset(value) returns value + 4. What value does offset(8) return?
Answer: ______________
Using positional arguments, which call supplies text then a number to reportGrade(studentName, numCorrect)?
- reportGrade("Lena")
- reportGrade("Lena", 21)
- reportGrade(21, "Lena")
Six greeting blocks use the same steps but greet different people. All six greetings must remain. Which change removes copied steps and keeps the different names?
- Use one fixed-name greeting function at all six locations
- Use one function with a name parameter and six calls
- Keep only one greeting block and remove the other five uses
The complete Python header is def move(x, y):. These are its only parameters, with no defaults. A call supplies three positional arguments. What happens?
- Python rejects the call before running its body
- Python stores the third argument for the next call
- Python repeats the body to use the third argument

Answer key

For grown-ups. Fold this page away before handing over the rest.

Name it once, call it anywhere W1-mt_pyo7yBg4H3-s1

Supply a value for the body's named input · person names an input. Each call supplies the value that the greeting body uses.
A reusable pack of steps under one name · A procedure groups reusable statements under a name. It does not guarantee speed or freedom from bugs.
True · A definition supplies reusable code. A later call executes the body.
60 · 18 / 30 = 0.6. Multiplying 0.6 by 100 gives a score of 60.
12 · The argument 8 fills value. The return expression computes 8 + 4 = 12.
reportGrade("Lena", 21) · The call supplies "Lena" to studentName and 21 to numCorrect, in the required positional order.
Use one function with a name parameter and six calls · One parameterized function shares the steps. Six calls supply the six required names without removing any greeting.
Python rejects the call before running its body · The complete definition accepts exactly two positional arguments. There is no optional third parameter or extra-argument parameter.