[Solved] Identify the error in this code snippet: import RPi.GPIO as GPIO GPIO.setmode(GPIO.BCM) GPIO.setup(20, GPIO.OUT) state = GPIO.input(20) print(state) | Raspberry Pi

Raspberry Pi - GPIO Basics with Python

Identify the error in this code snippet:

import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
GPIO.setup(20, GPIO.OUT)
state = GPIO.input(20)
print(state)

AGPIO.input function is misspelled

BPin 20 is set as output but read as input

CGPIO.setmode is missing

DPin number 20 does not exist

Step-by-Step Solution

Solution:

Step 1: Check pin setup mode
Pin 20 is set as output with GPIO.OUT.
Step 2: Check pin reading method
GPIO.input reads input pins only; reading output pin state this way is incorrect.
Final Answer:
Pin 20 is set as output but read as input -> Option B
Quick Check:
Read input only from pins set as input [OK]

Quick Trick: Only read input from pins set as input [OK]

Common Mistakes:

Master "GPIO Basics with Python" in Raspberry Pi

9 interactive learning modes - each teaches the same concept differently

More Raspberry Pi Quizzes

Identify the error in this code snippet: