[Solved] What will be the output of this Python code on a Raspberry Pi? import RPi.GPIO as GPIO GPIO.setmode(GPIO.BCM) GPIO.setup(18, GPIO.OUT) GPIO.output(18, GPIO.HIGH) print(GPIO.input(18)) | Raspberry Pi

Raspberry Pi - GPIO Basics with Python

What will be the output of this Python code on a Raspberry Pi?

import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
GPIO.setup(18, GPIO.OUT)
GPIO.output(18, GPIO.HIGH)
print(GPIO.input(18))

A1

B0

CGPIO.HIGH

DError: Cannot read output pin

Step-by-Step Solution

Solution:

Step 1: Understand GPIO setup and output
Pin 18 is set as output and then set to HIGH (which means 1).
Step 2: Reading the pin state
GPIO.input(18) reads the pin state; since it was set HIGH, it returns 1.
Final Answer:
1 -> Option A
Quick Check:
GPIO.output HIGH read = 1 [OK]

Quick Trick: Output HIGH pin reads as 1 in GPIO input [OK]

Common Mistakes:

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