Strong number

What is strong number ?

A number is called strong number if sum of the factorial of its digit is equal to number itself. 
Example: 145 since 1! + 4! + 5! = 1 + 24 + 120 = 145.

Here is a program regarding how to check strong number using c program :

#include<stdio.h>
#include<conio.h>
int main()
{
 int num,i,f,r,sum=0,num1;
 clrscr();
 printf("Enter a number: ");
 scanf("%d",&num);
 num1=num;
 while(num){
  i=1,f=1;
  r=num%10;
  while(i<=r){
   f=f*i;
   i++;
  }
  sum=sum+f;
  num=num/10;
 }
 if(sum==num1)
  printf("%d is a strong number",num1);
 else
  printf("%d is not a strong number",num1);
 getch();
 return 0;
}

OUTPUT :




Enter a number: 145

145 is a strong number_




145 is a strong number so its obviously shows that 145 is a strong number let us try some other value.

Enter a number: 146

146 is not a strong number_

you can check it is showing that 146 not a strong number because it is not a strong number.

If you found any problem in any problem or you have any question regarding program don't forget to leave a message in below comment box