I have encountered a problem that says to solve "9!". What is the exclamation point mean and how do you properly use this function in word problems/real life situations?

Many thanks

I have encountered a problem that says to solve "9!". What is the exclamation point mean and how do you properly use this function in word problems/real life situations?

Many thanks

Many thanks

- Martingale
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!= factorialI have encountered a problem that says to solve "9!". What is the exclamation point mean and how do you properly use this function in word problems/real life situations?

Many thanks

9!=nine factorial

How many ways can you arrange 9 unique books in a row on a shelf...9! ways