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Programming Loops with Robotics

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Programming Loops with Robotics

At a fishing harbour, Ethan and Sofia are programming a small robot to deliver supply tags along a clear test course. Work through the loop puzzles, trace the code, and design a safe robot routine. A loop repeats commands; a condition tells a program when to continue or stop.

Spot the Loop

Read each complete question and choose the best answer.

1.A robot must blink its signal light exactly 8 times. Which loop is the best fit?

A repeat loop set to 8
A forever loop
A stop command
A sensor reading with no loop

2.Sofia wants the robot to keep checking for a supply tag until its color sensor sees blue. Which plan describes this behavior?

Repeat the check a fixed number of times, then ignore the sensor
Use a loop that continues while the tag is not blue
Run the motor once and stop
Use a wait command without checking the sensor

3.Ethan programs a robot to drive forward for 2 seconds, pause for 1 second, then repeat that pair of actions 4 times. How many seconds does the sequence take, not counting startup time?

Trace the Robot

Follow the instructions in order. Keep track of how many times each action happens.

START

Repeat 3 times: Move forward 1 tile; turn right; flash light once.

Stop project

4.In the Supply-Tag Route Program, how many tiles forward does the robot move in total, and how many times does its light flash?

5.Why is putting the three route actions inside a repeat loop usually better than writing the same actions three times?

Debug and Design

Use careful reasoning to make each robot behave safely and correctly.

6.A robot keeps driving even after it reaches the end of its practice lane. Its program says “forever: move forward.” Give one change that would make it stop safely at the lane boundary.

7.Match each programming block to its job.

Repeat 5 times
Forever
Wait 1 second
Stop project

Keeps running enclosed commands until the program is stopped
Runs enclosed commands a fixed number of times
Pauses the program for a set time
Ends the program

8.Design a delivery routine in pseudocode: move forward 2 seconds, turn right, and flash the light once. Repeat the routine 3 times, then stop. Write the loop and the actions it contains.