Raspberry Pi - GPIO - Toggle LED when button press

toggle-led-when-button-press.py

import RPi.GPIO as GPIO

GPIO.setmode(GPIO.BCM)

TOGGLE_PIN = 20   # Change this PIN number to your button PIN
LED_PIN = 21      # Change this PIN number to your LED PIN

GPIO.setup(TOGGLE_PIN, GPIO.IN)
GPIO.setup(LED_PIN, GPIO.OUT)

value = 0
led_last = False
while(True):
	input = GPIO.input(TOGGLE_PIN)
 	
	if(input == 1 and value != input):
		print("Toggle pin HIGH, ", end='')
		value = input
		led_last = not led_last
		GPIO.output(21, int(led_last))
		print("LED turned on? : " + str(led_last))
	elif(input == 0 and value != input):
		print("Toggle pin LOW")
		value = 0