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Python while loop
Code pattern Code patterns
Definition
while condition: ... repeats while True; make sure the condition changes.
Example
while guess != answer: guess = int(input())Found in: course specifications, 2025 HSC marking guidelines, sample exam and familiarisation guidelines, school notes.
Where it is used in the test
Syllabus area: Code patterns.
Question types it can appear in
- Python: Write or complete it in the online Python tool.
- Code reading: Code or algorithm reading: interpret a fragment and state its output or purpose.
Where it has appeared in the paper
The Software Engineering Project (Part B). Part letters follow each paper’s own layout.
Related past questions
- Sample exam Q9 (2 marks): Algorithm design (guessing game) The Software Engineering Project (Part B) · 2 marks
These are the questions the flashcard set links to this term. Open each one and compare your answer with its marking criteria.
Study links
- Flashcard: Python while loop in Code Patterns: Pseudocode, Python, SQL, CSS (Years 11 and 12) · study that set
- Memorise: Python basics: input, selection, loops, strings
How to use it in an answer
A model sentence
Code pattern: “while condition: ...” Then apply it: while guess != answer: guess = int(input())
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.
Technique for the question types
- Python: Write code that runs: indentation, quotes, define functions before calling them, print the required output, meet every listed requirement.
What the marking guidelines and feedback say
The prompt/Get guess pair must be inside the loop; 'Well Done' after ENDWHILE.
Worked answers from the marking guidelines
Sample exam Q9 (2 marks): Algorithm design (guessing game) (2 marks): criteria and sample answer
Criteria
2: Correctly orders the steps. 1: Correctly orders the WHILE and ENDWHILE steps.
Sample answer
Set number = random integer between 0 and 100 WHILE guess <> number Display "Guess a number between 0 and 100:" Get guess ENDWHILE Display "Well Done"
Common mistakes
- Python questions (2025 HSC exam Q19): process string inputs; use a selection structure; code must execute in the environment; use correct indentation; call functions in the main program after defining them.
- Python questions (2025 HSC exam Q26): replicate the grid; use the random library; use selection and looping to access the list; include a method of checking the number of values; use meaningful variable names and constants; avoid overly complex structures such as nested IF loops.
- Use the term exactly as the syllabus words it, then link it to the scenario in the question; the 2025 feedback repeatedly rewards using the stimulus.
- Answer the command word: outline gives main points only, explain gives a reason or cause, discuss gives both sides.
Related terms
Same group in the syllabus: Python input and output · Python selection (if elif else) · Python for loop and range · Python strings and slicing · Python lists · Python 2D list (grid) · Python random numbers · Python functions · Global and local variables · Python file handling · Python modules and libraries · Python classes and objects · Python validation function pattern · Python try / except