C#: Check whether a number is Strong Number or not

C# Sharp For Loop: Exercise-47 with Solution

Write a C# Sharp program to check whether a number is Strong Number or not.

Sample Solution:-

C# Sharp Code:

using System;  // Importing necessary namespace

public class Exercise47  // Declaration of the Exercise47 class
{  
    public static void Main()  // Main method, entry point of the program
    {  
        // Declaration of variables
        int i, n, n1, s1 = 0, j;  
        int fact; 

        // Displaying information about checking whether a number is a Strong number or not
        Console.Write("\n\n");
        Console.Write("Check whether a number is Strong Number or not:\n");
        Console.Write("-------------------------------------------------");
        Console.Write("\n\n");

        // Prompting user to input a number to check for Strong number
        Console.Write("Input a number to check whether it is a Strong number: ");  
        n = Convert.ToInt32(Console.ReadLine());  // Reading user input

        n1 = n;  // Storing the original number for comparison

        // Loop to calculate the factorial sum of individual digits of the number
        for (j = n; j > 0; j = j / 10) 
        {  
            fact = 1;  // Initializing the factorial as 1 for each new digit

            // Loop to calculate the factorial of each digit
            for (i = 1; i <= j % 10; i++)  
            {  
                fact = fact * i;  // Calculating factorial
            }  
            s1 = s1 + fact;  // Accumulating the factorial sum
        }  

        // Checking if the sum of factorial of digits is equal to the original number
        if (s1 == n1)  
        {  
            Console.Write("\n{0} is a Strong number.\n\n", n1);  // Displaying result if the number is a Strong number
        }  
        else  
        {  
            Console.Write("\n{0} is not a Strong number.\n\n", n1);  // Displaying result if the number is not a Strong number
        }  
    }  
}

Sample Output:

Check whether a number is Strong Number or not:                                                             
-------------------------------------------------                                                           
Input a number to check whether it is Strong number: 2                                                      
2 is Strong number.

Flowchart:

C# Sharp Code Editor:

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