# Many Facts!

What is the value of the following sum:

$1! + 2! + 3! + 4! + 5! ?$

Details and assumptions

The number $$n!$$, read as n factorial, is equal to the product of all positive integers less than or equal to $$n$$. For example, $$7! = 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1$$.

×