When is a do-while appropriate?

Question

When is a do-while the better choice over other types of loops? What are some common scenarios where its better than others?

I understand the function of a do-while,

Answer 1

Normally when you need the user to input some value, the counter variable is based on the input value, you use do-while. //The following code is in C++. It requires the user to input a number and repeats until users input number larger than 0.

do{
    cout << "Enter a Positive integer: ";
    cin >> num;
}while( num < 0 );