title: Deleting an infinite list in Haskell
body: <p>I've just started using Haskell. I read that we can generate the infinite list of positive natural numbers with [0..], and tried it out.</p>
  
  <p>However, now I can't get back to the start of my file. I have deleted many of the numbers, but how can I get rid of this infinite list of numbers?</p>