What is strong number?
When the sum of the factorial of a number’s individual digits are equal to the number itself, then that number is called a strong number.
Example: 145 since 1! + 4! + 5! = 1 + 24 + 120 = 145.
C program to find strong number:
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#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; } |