## Session 1: Q* Factorial

In mathematics, the factorial of a strictly positive integer x, denoted as $$x!$$ is the product of all strictly positive integers less than or equal to x. The factorial of 0 is defined as 1. Calculate the factorial of an integer x and store the computed value in the variable result.

Examples:

• $$5! = 5 \times 4 \times 3 \times 2 \times 1 = 120$$
• $$0! = 1$$

##### Implementation
x = ... #the number
result = ... #store in this variable the factorial of x