Control Flow and Functions

A single boundary value changes the decision. Turn a conditional into a function and compare ordinary and boundary inputs.

Starting conditions

Scores=[45,60,75,90], and the passing criterion is 60 or higher.

Procedure

1. Use for and if to determine whether each score passes.
2. Implement the same process as pass_flags(scores,threshold) and compare the two results.

Results to retain

• A 4-row table and a reusable function.

Starting conditions

Compare passing-student counts and boundary samples at threshold=50,60,80.

Procedure

1. Call pass_flags with each Threshold in $50,60,80$. Keep the four scores unchanged.
2. Tabulate the four pass/fail decisions and the passing-student count for each Threshold. Check whether the comparison operator used when a sample's score equals the Threshold is >=.
3. Identify scores whose decisions changed with the Threshold and explain why.

Results to retain

• A table of decisions and passing-student counts by Threshold.

Starting conditions

Check the function's boundary values using scores [59,60,61] and an empty List.

Procedure

1. Keep Threshold 60 and write the expected function return values for scores [59,60,61] and an empty List before running.
2. Call pass_flags on both inputs and record expected and actual return values side by side. Explain the decision for score 60 and the form of the return value for an empty input.

Results to retain

• Expected and actual return values for both inputs, and an explanation of the boundary value.