Exercise 1: Change the program so it reads two arguments from the command line, and prints out a message using both of them
Escercise 2: Change the program so it performs a simple arithmetic operation on the two arguments and prints out the result. You can use read to convert a string to a number, and show to convert a number back into a string. Play around with different operations.
Exercise 3: getLine is an IO action that reads a line from the console and returns it as a string. Change the program so it prompts for a name, reads the name, and then prints that instead of the command line value