<h3 class='likesectionHead' id='lower-the-upper-sums'><a id='x1-1000'></a>Lower the Upper Sums!</h3>

The examples used here are from the weekly challenge problem statement and demonstrate the working solution. Part 1: Upper Lower You are given a string consists of english letters only. Write a script to convert lower case to upper and upper case to lower in the given string. The complete solution is contained in one file that has a simple structure. "ch-1.pl" 1 ≡ ⟨ preamble 2 ⟩ ⟨ upper lower…