C#: Check whether a given number is an Armstrong number or not

Last update on December 20 2024 12:40:58 (UTC/GMT +8 hours)

Write a C# Sharp Program to check whether a given number is an Armstrong number or not.

Sample Solution:-

C# Sharp Code:

using System;  // Importing necessary namespace

public class Exercise29  // Declaration of the Exercise29 class
{  
    public static void Main()  // Main method, entry point of the program
    {
        int num, r, sum = 0, temp;  // Declaration of variables num, r, sum, and temp as integers

        Console.Write("\n\n");  // Displaying new lines
        Console.Write("Check whether a given number is an Armstrong number or not:\n");  // Displaying the purpose of the program
        Console.Write("----------------------------------------------------------");  // Displaying a separator
        Console.Write("\n\n");  // Displaying new lines

        Console.Write("Input a number: ");  // Prompting the user to input a number
        num = Convert.ToInt32(Console.ReadLine());  // Reading the number entered by the user

        temp = num;  // Storing the original number in the 'temp' variable

        // Loop to calculate the sum of cubes of individual digits of the number
        for (; num != 0; num = num / 10)
        {
            r = num % 10;  // Extracting the rightmost digit of 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 == temp)
            Console.Write("{0} is an Armstrong number.\n", temp);  // Displaying the result if it's an Armstrong number
        else
            Console.Write("{0} is not an Armstrong number.\n", temp);  // Displaying the result if it's not an Armstrong number
    }
}

Sample Output:

Check whether a given number is armstrong number or not:                                                                                                       
----------------------------------------------------------                
Input  a number: 153                         
153 is an Armstrong number.   

Flowchart:

C# Sharp Code Editor:

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