﻿ C Program: Check whether a number is a Strong Number or not - w3resource

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

## C For Loop: Exercise-47 with Solution

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

Visual Presentation: Sample Solution:

C Code:

``````#include <stdio.h> // Include the standard input/output header file.

void main()
{
int i, n, n1, s1 = 0, j; // Declare variables to store input and results.
long fact; // Declare a variable to store factorial.

printf("\n\nCheck whether a number is Strong Number or not:\n "); // Print a message.
printf("----------------------------------------------------\n"); // Print a separator.

printf("Input a number to check whether it is Strong number: "); // Prompt the user for input.
scanf("%d", &n); // Read the number from the user.

n1 = n; // Store the original number for comparison.

// Loop to process each digit of the number.
for (j = n; j > 0; j = j / 10)
{
fact = 1; // Initialize factorial.
// Loop to calculate factorial of a digit.
for (i = 1; i <= j % 10; i++)
{
fact = fact * i;
}
s1 = s1 + fact;  // Accumulate factorial sum.
}

if (s1 == n1)
{
printf("\n%d is Strong number.\n\n", n1);  // Print result if it's a strong number.
}
else
{
printf("\n%d is not Strong number.\n\n", n1);  // Print result if it's 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: 15

15 is not Strong number.
```

Flowchart: C Programming Code Editor:

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