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C++ : Calculate Factorial of a Number Using Recursion

Tutorial by:Manisha Dubey      Date: 2016-06-18 04:32:46

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This program takes a positive integer from user and calculates the factorial of that number. Suppose, user enters 6 then,

Factorial will be equal to 1*2*3*4*5*6 = 720

Instead of using loops to calculate factorial, this program uses recursive function to calculate the factorial of a number.


Source Code to Calculate Factorial Using Recursion

/* Source code to find factorial of a number. */

using namespace std;
int factorial(int n);
int main()
    int n;
    cout << "Enter a positive integer: ";
    cin >> n;
    cout << "Factorial of " << n << " = " << factorial(n);
    return 0;
int factorial(int n)
     return n*factorial(n-1);


Enter an positive integer: 6
Factorial of 6 = 720

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