Factorial of a number n is the product of all integers from 1 to n. In this article, we will learn how to find the factorial of a number using iteration in C++.

Example

Input: 5

Output: Factorial of 5 is 120

Factorial of Number Using Iteration in C++

To find the factorial of a given number we can use loops. First, initialize the factorial variable to 1, and then iterate using a loop from 1 to n, and in each iteration, multiply the iteration number with factorial and update the factorial with the new value.

C++ Program to Find Factorial Using Iteration

The below program shows how we can find the factorial of a given number using the iteration method.

Factorial of 5 is 120

Time Complexity: O(N), where N is the given number
Auxiliary Space: O(1)