C#: Convert a given integer value to Roman numerals

C# Sharp Math: Exercise-13 with Solution

Write a C# Sharp program to convert a given integer value to Roman numerals.

From Wikipedia,
Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. Numbers in this system are represented by combinations of letters from the Latin alphabet. Modern usage employs seven symbols, each with a fixed integer value.

Symbol	I	V	X	L	C	D	M
Value   1	5	10	50	100	500	1000

Sample Solution:

C# Sharp Code:

using System;
using System.Text;
namespace exercises {
  class Program {
    static void Main(string[] args) {
      int n;
      n = 2365;
      Console.WriteLine("Original integer value: " + n);
      Console.WriteLine("Roman numerals of the said integer value:");
      Console.WriteLine(int_to_Roman(n));
      n = 254;
      Console.WriteLine("Original integer value: " + n);
      Console.WriteLine("Roman numerals of the said integer value:");
      Console.WriteLine(int_to_Roman(n));
      n = 45;
      Console.WriteLine("Original integer value: " + n);
      Console.WriteLine("Roman numerals of the said integer value:");
      Console.WriteLine(int_to_Roman(n));
      n = 8;
      Console.WriteLine("Original integer value: " + n);
      Console.WriteLine("Roman numerals of the said integer value:");
      Console.WriteLine(int_to_Roman(n));	  
      }

      public static string int_to_Roman(int n)
        {
          string[] roman_symbol = { "MMM", "MM", "M", "CM", "DCCC", "DCC", "DC", "D", "CD", "CCC", "CC", "C", "XC", "LXXX", "LXX", "LX", "L", "XL", "XXX", "XX", "X", "IX", "VIII", "VII", "VI", "V", "IV", "III", "II", "I" };
          int[] int_value = { 3000, 2000, 1000, 900, 800, 700, 600, 500, 400, 300, 200, 100, 90, 80, 70, 60, 50, 40, 30, 20, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 };

          var roman_numerals  = new StringBuilder();
          var index_num = 0;
          while (n != 0)
            {
                if (n >= int_value[index_num])
                {
                    n -= int_value[index_num];
                    roman_numerals.Append(roman_symbol[index_num]);
                }
                else
                {
                    index_num++;
                }
            }

        return roman_numerals.ToString();
        }
    }
  }

Sample Output:

Original integer value: 2365
Roman numerals of the said integer value:
MMCCCLXV
Original integer value: 254
Roman numerals of the said integer value:
CCLIV
Original integer value: 45
Roman numerals of the said integer value:
XLV
Original integer value: 8
Roman numerals of the said integer value:
VIII

Flowchart:

C# Sharp Code Editor:

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