C Program to find if the given number is a Strong Number or not.

Published on September 13, 2017 by Senthil Kumar

Filed under C

Last modified September 13, 2017

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Problem Statement

You need to write a program in C to find if the given number is a strong number or not.

How to find if the given number is a strong number ?

What is a strong number ?
A number is said to be a strong number when the sum of the factorial of a number’s individual digits are equal to the number itself.

#include<stdio.h>
int main()
{
int num,i,fact,r,sum=0,temp;
printf("Please enter a number to find strong number");
scanf("%d",&num);
 
temp=num;
while(num)
{
     i=1,fact=1;
     r=num%10;
 
     while(i<=r)
     {
        fact=fact*i;
        i++;
     }
     sum=sum+fact;
     num=num/10;
}
 
if(sum==temp)
  printf("\nThe number %d is a strong number",temp);
else
  printf("\nThe number %d is not a strong number",temp);
return 0;
}

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