# How to find factorial of a given number using C++ program | techgsr

Welcome to our blog post In this program, we will learn program **how to find factorial of a given number using C++ program?** *Here*, we will implement this program with and without using user define function.

### Logical Part of program:

- Input a number
- Initialize the factorial variable with 1
- Initialize the loop counter with N (Run loop from number (N) to 1)
- Multiply the loop counter’s value with factorial variable

** **

**#include <iostream>**

**using namespace std;**

** **

**int main()**

**{ **

** int num,i;**

** long int fact=1;**

** cout<<“Enter an integer number: “;**

** cin>>num;**

** for(i=num;i>=1;i–)**

** fact=fact*i;**

** cout<<“Factorial of “<<num<<” is = “<<fact<<endl;**

** return 0;**

**}**

** **

**Output :-**

** **

**Enter an integer number: 6**

**Factorial of 6 is = 720**

** **

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