Python random numbers

Code pattern Check Code patterns

Definition

import random then random.randint(a, b) gives a whole number a to b inclusive; use a set or a check to avoid repeats.

Example

n = random.randint(1, 50)

Check this one: Library use is allowed under 'modules and libraries'; random.randint is a standard Python function.

Where it is used in the test

Syllabus area: Code patterns.

Question types it can appear in

Python: 2025 Q26 random grid
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 A). Part letters follow each paper’s own layout.

Study links

Flashcard: Python random numbers 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

General advice, built from the definition and example above

Code pattern: “import random then random.randint(a, b) gives a whole number a to b inclusive; use a set or a check to avoid repeats.” Then apply it: n = random.randint(1, 50)

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

2025 HSC Q26 (5 marks): Design, construct and implement a solution (Python) · contains a reasoned or flagged note, read it as such

FLAG: the NESA sample tests pos (0 to 24) against numbers 1 to 25, so it is off by one (25 is never marked, 0 never appears). Safer: test pos + 1 in randList. Marker feedback: 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.

Common mistakes

Marker feedback on other questions of the same type (code and diagram feedback often applies across questions)

Check the sources: Library use is allowed under 'modules and libraries'; random.randint is a standard Python function.
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.

General advice

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.

Same group in the syllabus: Python input and output · Python selection (if elif else) · Python for loop and range · Python while loop · Python strings and slicing · Python lists · Python 2D list (grid) · Python functions · Global and local variables · Python file handling · Python modules and libraries · Python classes and objects · Python validation function pattern · Python try / except

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