Exam-style question
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Write a Python 3 subroutine called displayEvenTaskNumbers that receives a positive integer taskLimit. It must use iteration to examine the task numbers from 1 to taskLimit, and use selection to display only the even task numbers. Use at least one meaningful identifier and include a constant declaration for the starting task number. Briefly explain how sequence, selection and iteration are combined.
Model answer
What a good answer should say
- START_TASK_NUMBER = 1 def displayEvenTaskNumbers(taskLimit): for taskNumber in range(START_TASK_NUMBER, taskLimit + 1): if taskNumber % 2 == 0: print(taskNumber)
Explanation
Why this works
START_TASK_NUMBER is used as a named constant by convention. The statements in the subroutine execute in sequence.
The for loop provides iteration through the task numbers, and the if statement provides selection so that only even numbers are displayed. taskLimit and taskNumber are meaningful identifiers because they describe their purposes.
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