11.
In C++, what is the difference between the 'while' loop and the 'do-while' loop?

13.
What will be the output of the following code: for (int i = 0; i < 3; ++i) { for (int j = 0; j < 2; ++j) { cout << i << j << " "; } }?

14.
What is the syntax for the 'if-else' statement in C++?