title: Creating a matrix in Python with a range of numbers
body: <p>I would like to create a matrix with cells that increment by 10. For example, the output of a 3x3 matrix should be:</p>
  
  <p><code>[[10, 20, 30], [40, 50, 60], [70, 80, 90]]</code> </p>
  
  <p>The code I currently have creates a 3x3 matrix filled with 0s:</p>
  
  <pre><code>print([[0 for x in range(3)] for y in range(3)])
  
  output: [[0, 0, 0], [0, 0, 0], [0, 0, 0]]
  </code></pre>