In this tutorial, we will learn to write the program to find the factorial of numbers using the C programming language. Here we are going to follow a recursive approach.
What is Factorial of a number?
Factorial of a whole number ‘n’ is the product of that number ‘n’ with its every whole number in descending order till 1.
For example
Factorial of 5 is 5*4*3*2*1 = 120
And factorial of 5 can be written as 5!.
Factorial Program in C of a given number using Recursion
#include<stdio.h> long long fact(int num){ if (num == 0) return 1; else return(num * fact(num-1)); } int main() { int i,num,factorial=1; printf("Enter a whole number to find Factorial = "); scanf("%d",&num); printf("Factorial of %d is: %llu",num,fact(num)); return 0; }
Output
