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## Introduction

I have used Visual Studio 2012 for debugging purpose. But you can use any version of visul studio as per your availability.

## What is Armstrong number?

An Armstrong number is an n-digit number that is equal to the sum of the nth powers of its digits.

**For Example: **407 = 4^{3} + 0^{3} + 7^{3} = 64 + 0 + 343 = 407

using System; using System.Collections.Generic; using System.Linq; using System.Text; public class csharpExercise { static void Main(string[] args) { int lower, higher, i, temp1, temp2, remainder, n = 0; double result = 0; // Reading number Console.Write("Please Enter two numbers: "); lower = Convert.ToInt32(Console.ReadLine()); higher = Convert.ToInt32(Console.ReadLine()); Console.Write("Armstrong numbers between " + lower + " and " + higher + " are: "); for (i = lower + 1; i < higher; ++i) { temp2 = i; temp1 = i; // number of digits calculation while (temp1 != 0) { temp1 /= 10; ++n; } // result contains sum of nth power of its digits while (temp2 != 0) { remainder = temp2 % 10; result += Math.Pow(remainder, n); temp2 /= 10; } // checking if number i is equal to the sum of nth power of its digits if (result == i) { Console.WriteLine(i); } // resetting the values to check Armstrong number for next iteration n = 0; result = 0; } Console.ReadLine(); } }