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Java Java Basics Perfecting the Prototype Looping until the value passes

trina joy
trina joy
6,525 Points
Posted by trina joy
trina joy
6,525 Points

Do While loop - I still have syntax errors..

JavaTester.java:133: error: while expected } ^ JavaTester.java:137: error: illegal start of expression taskNumber = 1; ^ JavaTester.java:137: error: ')' expected taskNumber = 1; ^ 3 errors

Example.java 
// I have initialized a java.io.Console for you. It is in a variable named console.

String response;

boolean No;
do { 
response = console.readLine("Do you understand do while loops?");
  false = (response.equalsIgnoreCase("No"));

  if (response == No){
    console.printf("the answer is no");
  }

   while (true);

}

3 Answers

Steven Stanton
Steven Stanton
59,998 Points
Steven Stanton
Steven Stanton
59,998 Points

The while needs to come after the final curly bracket - at the moment it is inside the the do code block.

Grigorij Schleifer
Grigorij Schleifer
10,365 Points
Grigorij Schleifer
Grigorij Schleifer
10,365 Points

Hi trina,

here is a schematic view of a do/while loop

do{
//here comes your code you want to be executed at least once
//this is also the loop part 
} while(//here comes your condition, it can be true or false, depending on what you are supposed to do, if its true  - the loop will be executed);

The challenge should look like this:

String response; //in this String variable the user input will be stored/assignet 

do { 
response = console.readLine("Do you understand do while loops?"); //the answer of the user will be stored/assigned from console into "response"
  } while(response.equalsIgnoreCase("no")); //while the answer is no or No, the condition is true and the loop goes on, if the condition is false (Yes) the loop stops

I hope it helps ...

Grigorij

Grigorij Schleifer
Grigorij Schleifer
10,365 Points
Grigorij Schleifer
Grigorij Schleifer
10,365 Points

You also can do:

do { 
response = console.readLine("Do you understand do while loops?"); 
  } while(!response.equalsIgnoreCase("yes"));//while the response is not yes or Yes do the loop. If response is yes/Yes the while condition is false and the loop stops
Grigorij Schleifer
Grigorij Schleifer
10,365 Points
Grigorij Schleifer
Grigorij Schleifer
10,365 Points

Hey trina,

how is your challenge-solving going?

Grigorij