Please explain this line ....Vehicle v1 = new Vehicle();

Answer 1

Your object v1 is created using the Constructor of Vehicle.
Supposing it is C# :
Your class Vehicle.cs has a constructor (public and name of the class) :
public class Vehicle{

public Vehicle(){

}

public void vroom(){
Console.WriteLine("Vrooom");
}
}

Once your object v1 is created, you can call the different methods in your class Vehicle, per example vroom() by writing v1.vroom();

Classes are used to make your code easier to read. While playing with C#, you will discover the utility. Just enjoy coding. :)

Answer 2

tq