Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Java Java Basics Perfecting the Prototype Looping until the value passes

David Dong
David Dong
5,593 Points

"Too many loops"

I'm writing a do while loop, but it doesn't work.

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 do while loops?");
do{
  console.readLine("Do you understand do while loops?");
}while(response.equals("No"));

1 Answer

Steven Parker
Steven Parker
230,274 Points

Inside the loop, the result of calling "readLine" is not being stored anywhere, so the condition will never change and the loop will continue indefinitely.

The result value needs to be assigned to "response" inside the loop. Also, you won't need to call "readLine" before the loop starts, that's an advantage of the "do" loop.