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hello everyone welcome to wrath of math Iamp;#39;m your host Sean and in todayamp;#39;s video weamp;#39;re going to be taking a look at what the heck does this exclamation point mean in mathematics well itamp;#39;s called a factorial so if we have five exclamation point that reads five factorial letamp;#39;s spell it out very cool vocabulary word thatamp;#39;s FAC T Ori L factorial what does it mean well five factorial is equal to 5 times 4 times 3 times 2 times 1 similarly 7 factorial equal to 7 times 6 times 5 times 4 times 3 times 2 times 1 so if you donamp;#39;t see the pattern yet letamp;#39;s check out generic n factorial any number factorial letamp;#39;s call the number n n factorial is equal to the product of all positive integers less than or equal to n so for n factorial it would be n multiplied by n minus 1 multiplied by n minus 2 ellipses multiplied by a bunch of stuff and then finally multiplied by 1 and thatamp;#39;s where you stop so you take a number and if if