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

# 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: ");

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: