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.

Pictorial Presentation:

Sample Solution:

C Code:

#include <stdio.h>
void main()  
{  
    int i, n, n1, s1=0,j;  
    long fact; 

     printf("\n\n  Check whether a number is Strong Number or not:\n ");
     printf("----------------------------------------------------\n");

/* If sum of factorial of digits is equal to original number then it is Strong number */
  
    printf("Input a number to check whether it is Strong number: ");  
    scanf("%d", &n);  
  
    n1 = n;  
 
    for(j=n;j>0;j=j/10) 
    {  
  
        fact = 1;  
        for(i=1; i<=j % 10; i++)  
        {  
            fact = fact * i;  
        }  
         s1 = s1 + fact;  
 
    }  
  
    if(s1==n1)  
    {  
        printf("\n%d is Strong number.\n\n", n1);  
    }  
    else  
    {  
        printf("\n%d is not Strong number.\n\n", n1);  
    }  
}
  

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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