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*  So the age old knock knock joke goes like this:

    Person A:  Knock Knock.
    Person B:  Who's there?
    Person A:  Banana
    Person B:  Banana who?
    ...as long as Person A has answered Banana the above repeats endlessly
    ...assuming the person answers Orange we'd see
    Person B:  Orange who?
    ...and then the punchline.
    Person A:  Orange you glad I didn't say Banana again?
    (It's a really bad joke that makes it sound like "Aren't you glad I didn't say Banana again?")

    Let's just assume the only two words passed in from the console from Person B are either banana or orange.
*/

// ====BEGIN PROMPTING CODE====

// Person A asks:
console.printf("Knock Knock.\n");

// Person B asks and Person A's response is stored in the String who:
String who = "";  // created string outside the do-while loop so it is in scope of the loop
do{who = console.readLine("Who's there?  ");  // stores the string entered in the String variable "who"
  }while(!who.equalsIgnoreCase("orange"));    // checks if who is equal to "orange"
/*
*notice the not operator (!), this will make the conditional statement return the opposite of what it
*turns out to be. So if the String variable "who" is equal to "Orange", it would return true, however *because the "not" operator is there, it will return the opposite, which is false, in this case do-while 
*loop will stop looping.
*/

// Person B responds:
console.printf("%s who?\n", who);

// ==== END PROMPTING CODE ====