C Program to Find Factorial Using Recursion
Subject: PPS (Programming for Problem Solving)
Contributed By: Sanjay
Created At: February 3, 2025
Question:
Write a C Program to Find Factorial Using Recursion
Explanation Video:
Explanation:
Factorial of n is the product of all numbers from 1 to n.
The function factorial(n) calls itself recursively until it reaches n == 1.
The base case is factorial(1) = 1.
Source Code:
#include <stdio.h>
int factorial(int n) {
if (n == 0)
return 1;
else
return n * factorial(n - 1);
}
int main() {
int num;
printf("Enter a number: ");
scanf("%d", &num);
printf("Factorial of %d is %d\n", num, factorial(num));
return 0;
}
Input:
Enter a number: 5
Output:
Factorial of 5 is 120