What to do with None?

Question

JavaScript

Guys why when you run this program it pops out None
def pogoda(gorod):
print("It's 30 degrees Celsius right now!")
s = input ("Enter 'pogoda' : ")
if s == "pogoda":
print(pogoda(" city"))

Answer 1

const divs = document.querySelectorAll('.div1');

let index = 0;

setInterval(function() {
  divs[index].classList.remove('red');
  index = (index + 1) % divs.length;
  divs[index].classList.add('red');
}, 1000);