How do I calculate the factorial of a number?

How do I calculate the factorial of a number?

To calculate the factorial of a number n, you multiply all positive integers from 1 to n. For example, 5! = 5 x 4 x 3 x 2 x 1 = 120.

What is the factorial of 7?

The factorial of 7 (7!) is 7 x 6 x 5 x 4 x 3 x 2 x 1, which equals 5040.

Can you explain how to calculate it step by step?

Sure! To calculate 7!, you start with 7 and multiply it by each integer down to 1: 7 x 6 = 42, then 42 x 5 = 210, then 210 x 4 = 840, then 840 x 3 = 2520, then 2520 x 2 = 5040, and finally 5040 x 1 = 5040.

Are there any shortcuts for calculating large factorials?

For large factorials, you can use Stirling's approximation or software tools to compute them quickly, as they grow very fast.