elif -else program
number = float(input("Enter a number: "))
# Check if the number is positive, negative, or zero
if number > 0:
    print("The number is positive.")
elif number < 0:
    print("The number is negative.")
else:
    print("The number is zero.")

from machine import Pin
import time
print('Hello, chatnon')
led1 = Pin(2, Pin.OUT)
led2 = Pin(4, Pin.OUT)
led3 = Pin(16, Pin.OUT)
led4 = Pin(17, Pin.OUT)
led5 = Pin(5, Pin.OUT)
counter = 0

while True:
    led1.on()
    time.sleep(0.5)
    led1.off()
    time.sleep(0.5)
    led2.on()
    time.sleep(0.5)
    led2.off()
    time.sleep(0.5)
    led3.on()
    time.sleep(0.5)
    led3.off()
    time.sleep(0.5)
    led4.on()
    time.sleep(0.5)
    led4.off()
    time.sleep(0.5)
    led5.on()
    time.sleep(0.5)
    led5.off()
    time.sleep(0.5)
    counter += 1
    print('chatnon',counter)