How can you continuously monitor distance and print a warning only when the distance changes significantly (more than 0.1 meters) from the last reading?

hard📝 Application Q9 of 15

Raspberry Pi - gpiozero Library

AUse a loop storing last distance and compare with current distance each iteration

BCall sensor.distance() repeatedly without storing previous value

CUse sensor.distance property once outside the loop

DPrint warning every time without checking distance change

Step-by-Step Solution

Solution:

Step 1: Store last distance value
Keep a variable to remember the previous distance reading.
Step 2: Compare current distance with last distance in a loop
Print warning only if difference is greater than 0.1 meters.
Final Answer:
Use a loop storing last distance and compare with current distance each iteration -> Option A
Quick Check:
Track changes by comparing current and last distance [OK]

Quick Trick: Store last reading to detect significant changes [OK]

Common Mistakes:

Not storing previous distance
Calling distance as a function
Printing warning unconditionally

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How can you continuously monitor distance and print a warning only when the distance changes significantly (more than 0.1 meters) from the last reading?

Step 1: Store last distance value

Step 2: Compare current distance with last distance in a loop

Final Answer:

Quick Check:

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