# Write C# program find Armstrong numbers between 1 to n

## 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 = 43 + 03 + 73 = 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();    }}`

# Result 