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Item 174 of 426 · Year 11: Programming Mechatronics, 26 of 29

Control algorithm pattern (line follower)

Code pattern Check

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Definition

A closed-loop loop: WHILE the robot is running, read the sensor, IF the sensor sees dark THEN turn one way ELSE turn the other, ENDIF, ENDWHILE.

Example

WHILE on: read light; IF dark THEN turn left ELSE turn right.

Check this one: Not found word-for-word in the supplied syllabus, specifications, marking guidelines or notes; the definition is standard computing knowledge, so check it against your class notes.

Where you'll use it in the test

Syllabus area: Y11 Mechatronics.

Question types it can appear in

  • Pseudocode: Write a control loop
  • Code reading: Code or algorithm reading: interpret a fragment and state its output or purpose.
  • Multiple choice: Pick the option that matches the definition or example.

How to use it

A model sentence

General advice, built from the definition and example above

Code pattern: “A closed-loop loop: WHILE the robot is running, read the sensor, IF the sensor sees dark THEN turn one way ELSE turn the other, ENDIF, ENDWHILE.” Then apply it: WHILE on: read light; IF dark THEN turn left ELSE turn right.

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

Check yourself

Write or say the “Control algorithm pattern (line follower)” pattern from memory: the syntax and what it does.

Reveal the answer

A closed-loop loop: WHILE the robot is running, read the sensor, IF the sensor sees dark THEN turn one way ELSE turn the other, ENDIF, ENDWHILE.

Example: WHILE on: read light; IF dark THEN turn left ELSE turn right.

Could be tested as: Pseudocode, Code reading, Multiple choice.