title: Cases in strings, Pseudocode
body: <p>In pseudocode, how do I convert and switch between upper and lower cases of letters in strings? 
  I am trying to convert a code that is in C sharp to pseudocode :</p>
  
  <p><a href="https://i.stack.imgur.com/rvTix.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rvTix.png" alt="enter image description here"></a></p>