What is the meaning of ! in mathematics?

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Mrinnal Karan

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It's the sign of factorial. For example if I want to calculate the value of 4! Then it is equal to 4*3*2*1 = 24 Similarly, 7! = 7*6*5*4*3*2*1 = 5040
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I am P V Rao, an experienced Educator, Teacher and Tutor, with 40 years of experience.

The symbol used to denote factorial is ! It is used in permutations and combinations. The value of factorial 5 is 5X4X3X2X1=120
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