Question

How do you list all the Factorials up to 20?

Answer 1

See explanation...

Explanation:

Use the recursive definition of factorial:

`0! = 1`

`n! = (n-1)! * n` for `n > 0`

Create a document on your computer called factorials.html and put this in it:

Then open the document with a web browser to see:

`1! = 1`
`2! = 2`
`3! = 6`
`4! = 24`
`5! = 120`
`6! = 720`
`7! = 5040`
`8! = 40320`
`9! = 362880`
`10! = 3628800`
`11! = 39916800`
`12! = 479001600`
`13! = 6227020800`
`14! = 87178291200`
`15! = 1307674368000`
`16! = 20922789888000`
`17! = 355687428096000`
`18! = 6402373705728000`
`19! = 121645100408832000`
`20! = 2432902008176640000`

(or just visit http://flyingmice.co.uk/factorials.html)