Unlocking lessons

Question

Hello.
Help me please.
Can't unlock Level 3 lessons.
When you click on the link, the application is closed.

Answer 1

1.Restart your device
2. Uninstall Sololearn and install again
3. Write mail to Sololearn

Answer 2

Наиль it can be bug wait a little

Answer 3

And check your internet connection

Answer 4

Clear your caches then restart your app and still if problem happen then send a mail to sololearn
Or you can give feedback which is Available in this app ..

Answer 5

Which lesson

Answer 6

I think. You must finish Level2

Answer 7

Lesson 3.
Basic concepts.
Variables. I want to start doing the task, but the program closes.

Answer 8

1. Rebooted the device.
2. Reinstalled Sololearn.
3. But I haven't written a letter to Sololearn yet.

Answer 9

Tell me where is the error in the task of finding the perimeter of the circle?

Answer 10

public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
double pi = 3.14;
//ваш код
double l = 2 * 3.14 * radius;
System.out.println (l);

}
}