AskNumberInRange prompts the user expecting an answer that is a number between start and end.

AskQuestion prompts the user with a question and return the response.

AskQuestionNoEcho works like AskQuestion() except it doesn't echo user's input.

AskYNQuestion prompts the user expecting an answer that's either "y", "n" or a blank, in which case defaultAnswer is returned.

GetPassphrase will ask the user for a password with int number of retries.