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Java Java Basics Perfecting the Prototype Looping until the value passes

frankcastle
frankcastle
1,738 Points
Posted by frankcastle
frankcastle
1,738 Points

while loops in Java, need another example

Cant see what is wrong with this loop. Not getting any syntax errors

Example.java 
// I have initialized a java.io.Console for you. It is in a variable named console.
//String response = console.readLine("Do you understand while loops?");
String response = "NO";
boolean responseInvalid;

do {
  responseInvalid = response.equalsIgnoreCase("No");
  if (responseInvalid) {
  console.printf("Reenter response \n");
                        }
} while(responseInvalid);

2 Answers

Andrew Dummer
Andrew Dummer
6,885 Points
Andrew Dummer
Andrew Dummer
6,885 Points

Add response = console.readLine("Do you understand while loops?"); to the inside of your while loop. Every time the loop repeats it will grab input from the user.

Charlie Thomas
Charlie Thomas
40,856 Points
Charlie Thomas
Charlie Thomas
40,856 Points 
String response;
boolean responseInvalid;

do {
  response = console.readLine("Do you understand while loops?");
  responseInvalid = response.equalsIgnoreCase("No");
  if (responseInvalid) {
    console.printf("Reenter response \n");
  }
} while(responseInvalid);

You need to make sure you get the user's input inside the loop because otherwise response will not change and always be no.