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Java Java Basics Perfecting the Prototype Looping until the value passes

Ethan Britt
PLUS
Ethan Britt
Courses Plus Student 950 Points
Posted by Ethan Britt
Ethan Britt
Courses Plus Student 950 Points

do while loop difficulties

Not sure where to include the "banana" and "orange" values in the do while loop.

KnockKnock.java 
/*  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====
String who;
do {
// Person A asks:
console.printf("Knock Knock.\n");
// Person B asks and Person A's response is stored in the String who:
who = console.readLine("Who's there?  ");
// Person B responds:
console.printf("%s who?\n", who);
} while( who  ("banana"));
who = ("orange");{
  console.printf("Orange you glad I didn't say Banana again?");
}
// ==== END PROMPTING CODE ====

1 Answer

Arthur Crocquevieille
Arthur Crocquevieille
15,612 Points
Arthur Crocquevieille
Arthur Crocquevieille
15,612 Points

Hey !

You have to ask the question until the person enter something else than "banana", we want the loop to loop at least once so we use a do-while loop. When we enter something different than "Banana" we quit the loop and we assume that who = "Orange" so we have the following code : 

String who;
do{
// Person A asks:
 console.printf("Knock Knock.\n");

// Person B asks and Person A's response is stored in the String who:
 who = console.readLine("Who's there?  ");

// Person B responds:
 console.printf("%s who?\n", who);
}while(who == "banana");
who = "Orange";
console.printf("%s you glad I didn't say Banana again?",who);

Hope it helps :)