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Luis Ignacio Gomez
567 PointsI do not know:
How to tell the console "hey, if the answer is "no", keep runing without using an "isInvalidWord" loop. Also Idk how to put that a while loop.
I feel like I do not know nothing :(
// 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? ");
}
2 Answers
Ivan Penchev
13,833 PointsThe logic of do-while can be found here: https://www.tutorialspoint.com/cprogramming/images/cpp_do_while_loop.jpg
Basically you do something, atleast once and then check for the condition.
So lets see what you have? well you do indeed have what to do:
do {
response = console.readLine("Do you understand do while loops? ");
}
but you are missing the condition.
How can we add the condition?? Lets check the documentation, its located here: https://docs.oracle.com/javase/tutorial/java/nutsandbolts/while.html The Java programming language also provides a do-while statement, which can be expressed as follows:
do {
statement(s)
} while (expression);
so we need a while? OK!
so what should the condition be? Lets read your requirements: "How to tell the console "hey, if the answer is "no", keep runing "
So what is the "console" its an special object that we use that gives us input in the 'response ' variable. So for our condition we must evaluate that
in short, the answer is this:
do {
response = console.readLine("Do you understand do while loops? ");
} while (response.equals("No"))
Be sure to vote this answer if it was helpful, or leave a comment if you have more questions.
Raffael Dettling
32,998 PointsThe while condition comes after the last } and use the equals methode to compare to strings and don´t use response == "NO" i made that mistake :) Everything else looks good ^^
}while(response.equals("No"));
Why you sould use equals => https://stackoverflow.com/questions/513832/how-do-i-compare-strings-in-java
Ivan Penchev
13,833 PointsThanks mate, nice catch with the equals method, I edited my answer because of you :) Been a long time since I used Java.
Raffael Dettling
32,998 PointsYou´re welcome :) I usually use the == operator too. Instead of using methods :D It´s way quicker
Luis Ignacio Gomez
567 PointsLuis Ignacio Gomez
567 PointsThank you very much, your answer was very helpful! :)