[vtkusers] Immediate help needed:Calculating product of 1 to 100 numbers

[Wei Woo]

Dear friends,
                 Could anyone tell me what is the formula for calculating the product from 1 to 100 numbers.I know the formula for calculating the addition of  1 to n numbers is n(n+1)/2.Could anyone tell me what is the general formula for calculating the product of 1 to n numbers?
  regards,Wei.

       
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