Boolean question
A test whose answer is true or false.
Topic Guide
Conditions and Decisions
A condition is a question with a true or false answer. The answer decides which code runs.
Why this matters
Has the player reached safety? Is the quiz answer correct? Is the wall closer than 15 centimetres? Each question turns information into a decision the program can repeat reliably.
Beyond this topic
A thermostat compares the room temperature with a target. Below the target it heats; above it, it waits. The chosen boundary controls the behaviour.
Math and logic
If
Run these commands when the test is true.
If / else
Choose one of two paths.
Comparison
Check whether two values are equal or which one is larger.
Small examples
Quiz answer
Compare the response with the stored answer.
Safe zone
Set the game to WON when the player reaches the target.
Obstacle check
Turn when the distance reading falls below a limit.
Fuel warning
Show a warning when fuel drops below the chosen threshold.
Program connections
Where this topic appears.
Active now
Scratch & Game Design
Students author games, animations, simulations, and strange interactive stories while learning how events, rules, and state fit together.
Active now
Robotics
Students write commands, wire simple circuits, read sensors, and trace physical cause and effect through the Sense–Decide–Act loop.
Coming later
Roblox Studio / Lua
A possible later step from visual programming into Lua, 3D objects, events, and larger game rules.
Coming later
AI & Smart Machines
A possible later program for testing patterns, predictions, prompts, mistakes, and the limits of AI tools.
Common mistakes
Checking once
The program tests a changing condition only when the game starts.
Reversed comparison
The warning appears above the threshold instead of below it.
Overlapping outcomes
Win and loss can both become true without a priority rule.
Missing starting value
The condition reads a variable that was never initialized.
Put the idea to work
Scratch & Game Design
Guided Project
Quiz of Questionable Knowledge
Build a quiz that checks answers, gives useful feedback, keeps score, and knows which question comes next.
See how it works
Scratch & Game Design
Guided Project
Escape from the Giant Pigeon
Build a fast chase game with known positions, collision rules, win and loss states, and reliable restart behaviour.
See how it works
Robotics
Computer Lab Project
Robot Patrol Challenge
Design a repeating patrol that notices an obstacle, tries a response, and checks whether the response worked.
See how it works