Where are two locations that you can see a cell formula

Which task uses a simple parameter?

Write a program that asks the user to enter the name of an input file. if the file does not exist, the program should prompt the user to enter the file name again. if the user types quit in any uppercase/lowercase combinations, then the program should exit without any further output.

Who is most likely be your target audience if you create a slide presentation that had yellow background and purple text