Loop question please help

Hi

Please Find Attachment and run it.
you will find you accepted result

class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("enter the distance");
            int distance = Convert.ToInt32(Console.ReadLine());
            if (distance > 0 && distance < 100)
                Console.WriteLine("25$");
            else if (distance > 99 && distance < 300)
                Console.WriteLine("40$");
            else if (distance > 299 && distance <499 )
                Console.WriteLine("55$");
            else if (distance > 500)
                Console.WriteLine("70$");
            Console.ReadLine();
        }

Normally in the loop we make initial value of x=0 and x keep on increase to maximum value we want. But here is different because array range (for example distance 0 to 90) takes into account. Therefore at beginning x is set to take maximum value 3, see x variable is set as 3 because maximum value of index is 3. Therefore at the beginning distance[x] is 500.

Now we say we input 1000 miles. So inside the while condition x is true (because initial value of x is 3) and the distance is false (because initial value of distance[x] is 500 which is less than 1000 (which we input)) therefore condition is false - loop will end and the execution will go to next line. Here is very important, which is the next line? Not the decrement value of x (that means –-x) because loop ended but the line which is telling ticket price.

Now we say our input is 100. So inside the while condition x is true (because initial value of x is 3) and the distance is true (because initial value of distance[x] is 500 which is greater than 100 (which we input)) therefore condition is true. Therefore here the loop will not end because condition is true. Execution will go to next line which is next line that is decrement of x value –-x.

Now x=2 and distance[x] = 300 (which is greater than input value that is 100) condition is true loop will continue.
Now x=1 and distance[x] = 100 (which is equal to input value that is 100) condition is false loop will end and the execution will go to next line which will tell the ticket price.

Concept is loop must end when the value of the input distance is greater or equal to distance[x] but at the same time it must show the relevant price.

Anyone can explain better than this is highly appreciated.

Hey Maha, if you dont mind could you explain how your code works a little bit?

It wont work, if I choose something like 250 then it will call else statement


This is what i have done



  int[] distance = new int[] {0, 100, 300, 500 };
  int[] ticketPrice = new int[] { 25, 40, 55, 70 };

  int distanceInput;
  double ticketPrice1 = 0;

  bool found = false;


  Console.WriteLine("Please enter the distance you traveled");
  distanceInput = Convert.ToInt32(Console.ReadLine());
  for (int x = 0; x < distance.Length; ++x)
  {
  if(distanceInput == distance[x])
  {
  found = true;
  ticketPrice1 = ticketPrice[x];
  }

  }
  if(found)
  Console.WriteLine("It will cost you {0}", ticketPrice1);
  else
  Console.WriteLine("Too bad");

Just store the lower bound of each range in the distance array.

You can do this because you know that the upper bound will be one less than the lower bound of the next element in the array, apart of course from the final element.