[Solved] What will the following code print if the sensor measures 0.25 meters?... What will the following code print if the sensor measures 0.25 meters? | Raspberry Pi

Raspberry Pi - gpiozero Library

What will the following code print if the sensor measures 0.25 meters?

from gpiozero import DistanceSensor
sensor = DistanceSensor(echo=17, trigger=4)
distance_cm = sensor.distance * 100
print(round(distance_cm))

A25

B0.25

C250

D2.5

Step-by-Step Solution

Solution:

Step 1: Understand sensor.distance value
The sensor.distance returns distance in meters as a float, here 0.25 meters.
Step 2: Convert meters to centimeters and round
Multiplying 0.25 by 100 gives 25 centimeters, then rounding keeps it 25.
Final Answer:
25 -> Option A
Quick Check:
0.25 m * 100 = 25 cm [OK]

Quick Trick: Multiply meters by 100 to get centimeters [OK]

Common Mistakes:

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What will the following code print if the sensor measures 0.25 meters?