title: how can i make a list from 1 to a certain number
body: <p>how can i make a list of number form 1 to a certain number?
  i want to make a script that can do things like below:</p>
  
  <pre><code>number=20
  list=[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]
  </code></pre>
  
  <p>i don't know how do make this happens.
  is there certain function for auto produce the list, i am now typing it manually?
  i've try to google it, but most the answers are about seperating a number and make a list.like this</p>
  
  <pre><code>a='1234'
  a.split(' ')
  [1,2,3,4]
  </code></pre>