pc-ip-14.c

Metadata

• Author — Amit Dutta (amitdutta4255@gmail.com)
• Last updated — 05 Jan 2026
• License — MIT

Problem Statement

Problem Statement

Question 14: Write a program to calculate the factorial of a number using recursive and iterative function.

Source Code

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#include <stdio.h>

long long int fact_rec(int);
long long int fact_ite(int);

int main()
{
    int n;
    printf("Enter the number: ");
    scanf("%d", &n);
    printf("\nFactorial of %d (Recursion): %lld", n, fact_rec(n));
    printf("\nFactorial of %d (Iteration): %lld", n, fact_ite(n));
    return 0;
}

long long int fact_ite(int n)
{
    int i, pd = 1;
    for (i = 1; i <= n; i++)
    {
        pd *= i;
    }
    return pd;
}

long long int fact_rec(int n)
{
    if (n == 0)
    {
        return 1;
    }
    else
    {
        return n * fact_rec(n - 1);
    }
}