C#: Find the Armstrong number for a given range of number

C# Sharp For Loop: Exercise-30 with Solution

Write a C# Sharp program to find the Armstrong number for a given range of numbers.

Sample Solution:-

C# Sharp Code:

using System;  // Importing necessary namespace

public class Exercise30  // Declaration of the Exercise30 class
{  
    public static void Main()  // Main method, entry point of the program
    {
        int num, r, sum, temp;  // Declaration of variables num, r, sum, and temp as integers
        int stno, enno;  // Declaration of variables stno and enno as integers

        Console.Write("\n\n");  // Displaying new lines
        Console.Write("Find the Armstrong numbers for a given range of numbers:\n");  // Displaying the purpose of the program
        Console.Write("--------------------------------------------------------");  // Displaying a separator
        Console.Write("\n\n");  // Displaying new lines

        Console.Write("Input the starting number of the range: ");  // Prompting the user to input the starting number of the range
        stno = Convert.ToInt32(Console.ReadLine());  // Reading the starting number of the range entered by the user

        Console.Write("Input the ending number of the range: ");  // Prompting the user to input the ending number of the range
        enno = Convert.ToInt32(Console.ReadLine());  // Reading the ending number of the range entered by the user

        Console.Write("Armstrong numbers in the given range are: ");  // Displaying a message to indicate the output

        // Loop to iterate through numbers within the given range
        for (num = stno; num <= enno; num++)
        {
            temp = num;  // Storing the original number in the 'temp' variable
            sum = 0;  // Initializing the sum variable to 0

            // Loop to calculate the sum of cubes of individual digits of the number
            while (temp != 0)
            {
                r = temp % 10;  // Extracting the rightmost digit of the number
                temp = temp / 10;  // Removing the rightmost digit from the number
                sum = sum + (r * r * r);  // Calculating the sum of cubes of digits
            }

            // Checking if the calculated sum of cubes of digits is equal to the original number
            if (sum == num)
                Console.Write("{0} ", num);  // Displaying the number if it's an Armstrong number within the range
        }

        Console.Write("\n");  // Displaying a new line at the end
    }
}

Sample Output:

Find the Armstrong number for a given range of number:                                                                                                       
--------------------------------------------------------            
Input starting number of range: 1                                        
Input ending number of range : 500                                                                                                         
Armstrong numbers in given range are: 1 153 370 371 407 

Flowchart:

C# Sharp Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a C# Sharp Program to check whether a given number is an Armstrong number or not.
Next: Write a program in C to display the pattern like a diamond.