Factorial for number N is N x N-1 x N-2 X N- (N-1).
e.g. if you need to calculate factorial for 5 then compute 5 x 4 x 3 x 2 x 1.
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Factorial for number N is N x N-1 x N-2 X N- (N-1).
e.g. if you need to calculate factorial for 5 then compute 5 x 4 x 3 x 2 x 1.