Answer
The expression $ n!$ can be calculated as
$ n!=\left( n \right)\cdot \left( n-1 \right)\cdot \left( n-2 \right)\cdot ...\cdot 3\cdot 2\cdot 1$.
Work Step by Step
According to the definition of the factorial of any positive number,
$ n!=\left( n \right)\cdot \left( n-1 \right)\cdot \left( n-2 \right)\cdot ...\cdot 3\cdot 2\cdot 1$
That means we get the product of the numbers from 1 to $ n $.
Point to be noted $0!=1$.
