title: Python- %s %f %d % etc
body: <p>I am new to python and I was on this website: <a href="https://www.learnpython.org/en/Variables_and_Types" rel="nofollow noreferrer">https://www.learnpython.org/en/Variables_and_Types</a> 
  suddenly, at the bottom there are these characters like %f %d %s %.
  Does anyone know what it means???</p>