import RPi.GPIO as GPIO
import time

# Set the GPIO mode
GPIO.setmode(GPIO.BCM)

# Define GPIO pins
LED_PIN = 17
SWITCH_PIN = 18

# Set up the GPIO pins
GPIO.setup(LED_PIN, GPIO.OUT)
GPIO.setup(SWITCH_PIN, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)

try:
    while True:
        if GPIO.input(SWITCH_PIN) == GPIO.HIGH:
            GPIO.output(LED_PIN, GPIO.HIGH)
        else:
            GPIO.output(LED_PIN, GPIO.LOW)
        time.sleep(0.1)
except KeyboardInterrupt:
    GPIO.cleanup()