[Solved] What will be printed by this code if the button connected to GPIO 20 is NOT pressed? import RPi.... What will be printed by this code if the button connected to GPIO 20 is NOT pressed? | Raspberry Pi

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What will be printed by this code if the button connected to GPIO 20 is NOT pressed? import RPi.GPIO as GPIO GPIO.setmode(GPIO.BCM) GPIO.setup(20, GPIO.IN, pull_up_down=GPIO.PUD_UP) if GPIO.input(20) == 0: print("Pressed") else: print("Not Pressed")

APressed

BNot Pressed

CRuntime Error

DNo output

Step-by-Step Solution

Solution:

Step 1: Understand pull-up resistor effect
Pin reads HIGH by default; pressing button connects pin to LOW.
Step 2: Evaluate condition when button not pressed
GPIO.input(20) returns 1 (HIGH), so condition is False, prints "Not Pressed".
Final Answer:
Not Pressed -> Option B
Quick Check:
Pull-up unpressed = input HIGH = prints "Not Pressed" [OK]

Quick Trick: Pull-up means unpressed reads HIGH [OK]

Common Mistakes:

Assuming pressed means HIGH with pull-up
Confusing 0 and 1 in condition
Expecting error in correct code

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More Raspberry Pi Quizzes

What will be printed by this code if the button connected to GPIO 20 is NOT pressed?

Step 1: Understand pull-up resistor effect

Step 2: Evaluate condition when button not pressed

Final Answer:

Quick Check:

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