Instead of calculating out a factorial 1 digit at a time, use this calculator to calculate the factorial, n! of a number n. Enter an integer, up to 4 digits long, and choose if you want the full integer answer or abbreviated scientific notation. If you select the Full Integer Answer for large factorials, you may want to copy the result and paste it into another document to view it.
In mathematics, there are n! ways to arrange n objects in sequence. "The factorial n! gives the number of ways in which n objects can be permuted." For example:
 For more information on factorials please see http://mathworld.wolfram.com/Factorial.html