title: What does the % sign mean in coding?
body: <p>Like <code>%i</code> or <code>%yellow</code>? 
  I'm not looking for it as an operator like <code>67%3</code>. But like this:</p>
  
  <pre><code>print("pink is %i" %grade)
  </code></pre>
  
  <p>what does the above code mean?</p>