I am having trouble with Java Basics

Question

Now continually prompt the user in a do while loop. The loop should continue running as long as the response is No. Don't forget to declare response outside of the do while loop.
```Example.java
// I have initialized a java.io.Console for you. It is in a variable named console.
String = response;
do{
  response = console.readLine("Do you understand do while loops?");
 }while(response.equalsIgnoreCase("no"));
if{
  response = "yes" console.exit;
}
```

Michael Hess · Accepted Answer

Hi Joey,
The do-while loop is a post-test loop.  A post-test loop runs the code inside the loop body at least one time then evaluates the looping condition after the code in the loop body is ran. So, there is no need for an if-statement in this exercise.
```java
//Declare a String variable named response, then initialize it using double quotes
String response;
// The do while loop keeps asking the same question until "yes" is entered
//So we want to keep repeating when "no" is typed
// Exit the loop when "yes" is entered
//task 2
do{
response = console.readLine("Do you understand do while loops?");  // "yes" or "no" is stored in the response variable 
// when someone types "no" the loop repeats
// when someone types "yes" the loop is exited
}while(response.equalsIgnoreCase("no"));
```
If you have any other questions feel free to ask!  Hope this helps!

Ryan Ruscett · Answer

Hola,
You are close, String = response is the same as saying String the object is equal to response. That can't happen. to define a variable without giving it a value. It's as follows:
```java
String response;
```
The best part of this is that because it's defined at the class level. Scope isn't a worry and you can change the value through out the class. 
Next, you are assuming that if I don't say No, that I am going to say yes. What if I said maybe? Then the program would fail. I didn't choose yes or no. 
```java
do{
  response = console.readLine("Do you understand do while loops?");
 }while(response.equalsIgnoreCase("no"));
if{
  response = "yes" console.exit;
}
```
See, you have a while loop that runs 1 time no matter what. But if I choose maybe, it breaks. If I say anything other than No. It leaves the do while checks if it's yes and exits. But if it's not yes what then?
```java
String response;
do{
  response = console.readLine("Do you understand do while loops?");
  if (response.equals("No")) {
    console.printf("Because you said %s, you passed the test!", response); 
  }
 }while(response.equals("No"));
```
Now see above. I define the variable above the do while. Now, I ask a question. IF the question comes back as No, then I print awesome you passed the test. Then it goes down to the while, and says oh sweet. It's No so it quites. Now if I typed yes, maybe, food, dog. Wouldn't matter. It would just keep going until it got No. There are several ways you could do it, you could of defined a boolean and set it in the if statement or not. But hey, less is more and do what you know. 
Let me know if that helps. 
Thanks!

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Joey Sadowski

Joey Sadowski

I am having trouble with Java Basics

2 Answers

Michael Hess

Michael Hess

Ryan Ruscett

Ryan Ruscett