What does a ! mean in math terms?

I really want to know this and I can't figure out what it is for.

dogeminer
May 13, 2015

#2**+10 **

This is called a "factorial"......it is the procuct of all the positive integers up to, and including, "n"

For example..... n! .... where n = 3....we have 1 x 2 x 3 = 6

Or ..... n! .... where n = 4 = 1 x 2 x 3 x 4 = 24

This concept is very useful in statistics and probabilty in "counting" operations

BTW .... 0! is defined to be = 1

CPhill
May 13, 2015

#1**+5 **

it means you multiply all the numbers up to that number together. for example, 5! = 1*2*3*4*5 or 120

Guest May 13, 2015

#2**+10 **

Best Answer

This is called a "factorial"......it is the procuct of all the positive integers up to, and including, "n"

For example..... n! .... where n = 3....we have 1 x 2 x 3 = 6

Or ..... n! .... where n = 4 = 1 x 2 x 3 x 4 = 24

This concept is very useful in statistics and probabilty in "counting" operations

BTW .... 0! is defined to be = 1

CPhill
May 13, 2015