In this article, we will see how you can calculate strong number from 1 to 10.

Strong number is a special number whose sum of the factorial of digits is equal to the original number

```
#include <stdio.h>
int factorial(int a);
int main() {
int fact = 1, sum = 0;
int n, r;
n = 10;
printf("Strong numbers are :");
for (int i = 1; i <= n; i++) {
int k = i;
while (k != 0) {
r = k % 10;
fact = factorial(r);
k = k / 10;
sum = sum + fact;
}
if (sum == i) {
printf("%d, ", i);
}
sum = 0;
}
return 0;
}
int factorial(int f) {
int fact = 1;
for (int i = 1; i <= f; i++) {
fact = fact * i;
}
return fact;
}
```

output:

Strong numbers are :1, 2

## Top comments (0)