Input
A signal or value the program can read.
Topic Guide
Input and Output
Input enters a system. The code handles it, and an output makes the result visible, audible, or physical.
Why this matters
A key press can move a sprite. A button can light an LED or sound a buzzer. Students identify the signal coming in, then write the rule that produces the response.
Beyond this topic
A doorbell turns a button press into sound. A keyboard game does the same sort of work with keys and sprites; a microcontroller uses pins, LEDs, motors, and buzzers.
Math and logic
Processing
The rule applied to that information.
Output
The resulting movement, light, sound, or display.
Mapping
The chosen connection between an input and its response.
Small examples
Keyboard to movement
Connect four keys to changes in x and y.
Button to buzzer
Play a sound when a button is pressed.
Timer to display
Show the measured time as a number.
Sensor to motor
Change the motor command after a reading crosses a 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.
Common mistakes
Input never read
The output code exists, but nothing checks the control.
Competing inputs
Two controls try to set the same output with no priority rule.
Wrong pin or object
The code listens somewhere other than where the component is connected.
Silent response
There is no visible sign that the input was received.
Put the idea to work
Robotics
Guided Project
Button and Buzzer Alarm
Connect a button to a visible and audible alarm, then write clear rules for arming, triggering, and resetting it.
See how it works
Robotics
Guided Project
LED Traffic Light
Program a timed traffic light, then add a pedestrian request without creating an unsafe transition.
See how it works
Scratch & Game Design
Guided Project
Robot Hamster Command Centre
Send movement commands to a robot hamster as it crosses a small security map.
See how it works