In mathematics,the factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n. For example, 5 ! = 5 × 4 × 3 × 2 × 1 = 120.
#include <stdio.h> int factorial(int num); int main() { int num,fn; printf("Enter the number :"); scanf("%d",&num); fn=factorial(num); printf("Factorial Number of %d is %d",num,fn); printf("\nEnter another number :"); scanf("%d",&num); fn=factorial(num); printf("Factorial Number of %d is %d",num,fn); return 0; } int factorial(int num) { int fn=1; while(num>=1) { fn=fn*num; num--; } return fn; } |
Enter the number :9 Factorial Number of 9 is 362880 Enter another number :12 Factorial Number of 12 is 479001600