Problem Statement

Separate the string "Hello,How,Are,You,Today" by commas into an array (or list) so that each element of it stores a different word. Display the words to the 'user', in the simplest manner possible, separated by a period. To simplify, you may display a trailing period.

Let's start with the solution:

print ["Original:"  original: "Hello,How,Are,You,Today"]
tokens: parse original ","
dotted: ""  repeat i tokens [append dotted rejoin [i "."]]
print ["Dotted:  "  dotted]