title: Sum of number using user entered 4 digit numbers
body: <pre><code>    using System;
      using System.Collections.Generic;
      using System.Linq;
      using System.Text;
  
      namespace Assignment_1
      {
          class Program
          {
              static void Main(string[] args)
              {
                  double SurfaceArea, Height, Radius, Volume;
                  string inputString;
                  int number;
  
                  {
                      //Title Text
                      Console.WriteLine("Cylinder - Surface area and volume calculator");
  
                      //Prompts for input request
  
                      Console.Write("Enter the radius: ");
                      inputString = Console.ReadLine();
  
                      //displays user input for radius
  
                      Console.WriteLine("{0}", inputString);
  
                      Radius = double.Parse(inputString);
                      Console.Write("Enter Height: ");
                      inputString = Console.ReadLine();
                      Height = double.Parse(inputString);
  
                      //displays user input for height
  
                      Console.WriteLine("{0}", inputString);
  
                      //Calculation and display of surface area
  
                      SurfaceArea = (((2 * ((3.149)) * Radius) + (((2 * (3.149)) * (Radius) * Height))));
                      Console.WriteLine("Surface Area = {0}", SurfaceArea);
  
                      //Calculation and display of volume
  
                      Volume = ((3.149 * Radius * Radius * Height));
                      Console.WriteLine("The Volume = {0}", Volume);
  
                  } 
  
                  //Prompt the user for a four digit number (e.g. 5297) and display the sum of all of the digits
                  //The four digit number must be read as a single number and the individual digits must be broken out using div (/) and mod (%).
  
      //Adds white space between lines
                  Console.WriteLine("");
  
                  Console.WriteLine("Sum of the digits - enter four digit whole numbers");
                  Console.Write("please enter four digit whole number: ");
  </code></pre>
  
  <p><strong>// At this point i'm confused as to what i should do to get a 4digit number where the number cannot equal zero, be a decimal or be a negative number, cannot be less than 1000 or greater than 9999 i'm not asking for answers because this is for class but some guidance would be helpful</strong></p>
  
  <pre><code>            {
                  //Prompt the user for three numbers and display the largest number. Use Math.Max in your solution. 
                  Console.ReadLine();
              }
          }
      }
  }
  </code></pre>