What is the "!" called in MATH?

Question

I know what it means, but I just don't know the name.

Answer 1

It's normally read as "factorial." I take it that you know that 5! = 5*4*3*2*1, for example; it's read as "five factorial." However, the ! itself would still be called an exclamation point. It can sometimes be called a "bang," but that's more of a computer science thing than a math thing.

Answer 2

Factorial !

Example: 5! = 5 x 4 x 3 x 2 x 1 = 120

Gets really big really fast , doesn't it? Try your own number on any scientific calculator. Try 20! Think Bill Gates has this much money? Not a chance! Cool stuff this math!

You will encounter this factorial stuff in math involving combinations and permutations and the like. Some of this stuff you learn in the early grades! Now I can't stop putting exclamation marks after my sentences---LOL!!!

Answer 3

What Is Called In Math

Answer 4

it's called the factorial operator. You multiply every number between 1 and the number before the !. Used a lot in probability calculations.

Answer 5

Factorial operator as others did.
Thsi is commonly used in Trigonometry and Advanced Algebra!
lol!

Answer 6

"factorial".
n! is read as "n factorial".

n! = 1 * 2 * 3 * ... * n

for example:
5! = 1 * 2 * 3 * 4 * 5

Good Luck,

Kempos

Answer 7

Factoriol. It means multiply. For example, 1! is 1 x 1. 0! is also 1.

Answer 8

It's factorial.

Answer 9

factorial operator

Answer 10

factorial

Edit: He already said he knows what it means.... so stop trying to get the dang 10 points for best answer by elaborating like a math professor