Multi-way selection (CASEWHERE)

Code pattern

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Definition

CASEWHERE expression evaluates to choice a: ... OTHERWISE: default END CASE; only one process runs.

Example: CASEWHERE grade evaluates to "A": ... OTHERWISE: ...

Found in: course specifications, 2025 HSC marking guidelines, school notes, past SDD papers.

Where you'll use it in the test

Syllabus area: Code patterns.

Question types it can appear in

Pseudocode: Use it correctly in the exam pseudocode editor.
Code reading: Code or algorithm reading: interpret a fragment and state its output or purpose.
Drawing: Draw or label it in the online drawing tool.

How to use it

A model sentence

General advice, built from the definition and example above

Code pattern: “CASEWHERE expression evaluates to choice a: ...” Then apply it: CASEWHERE grade evaluates to "A": ... OTHERWISE: ...

In a short answer, give the definition in your own words first, then tie it to the situation in the question. Do not copy the example above unless it fits the scenario.

Go deeper

Flashcard: Multi-way selection (CASEWHERE) in Code Patterns: Pseudocode, Python, SQL, CSS (Years 11 and 12) · study that set
Memorise: Python and SQL you must be able to write
Notes: Control structures in HSC pseudocode (Pseudocode, flowcharts and diagram rules)
Full term page: every question, note and marking comment for Multi-way selection (CASEWHERE)

Check yourself

Write or say the “Multi-way selection (CASEWHERE)” pattern from memory: the syntax and what it does.

Reveal the answer

CASEWHERE expression evaluates to choice a: ... OTHERWISE: default END CASE; only one process runs.

Example: CASEWHERE grade evaluates to "A": ... OTHERWISE: ...

Could be tested as: Pseudocode, Code reading, Drawing.