The exclamation sign in maths means FACTORIAL - multiply the number by all numbers less than it to 1.
For Example:
7! means 7 x 6 x 5 x 4 x 3 x 2 x 1 = 5040
same goes with the other non zero positives.
In maths, 0! has been assumed to be ONE.
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An exclamation mark after a number is the symbol for the factorial function.
It might mean that the person is shouting okay or that they are irritated. I'm OK! OK! I'll do it. Just stop bothering me!
Not always - it depends on the context. There would be an exclamation point if it was being shouted or if it was being said in an exclamatory manner.
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