Calculate the Factorial of an Integer in C#

Anshul R

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2.25/5 (6 votes)

3 Oct 2011CPOL

Use Recursion.int factorial(int n){ if(n<0) return -1; if(n==0 || n==1) return 1; return n * factorial(n-1);}

Use Recursion.

C#

int factorial(int n)
{
 if(n<0)
  return -1;
 if(n==0 || n==1)
  return 1;

 return n * factorial(n-1);
}

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Written By

Anshul R

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 India

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Comments and Discussions

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Reason for my vote of 5 good mandar130519-Oct-11 0:25 mandar1305 19-Oct-11 0:25  Reason for my vote of 5 good Guys, please. This is a tail-recursion and it won't be any s... ckbz18-Oct-11 21:13 ckbz 18-Oct-11 21:13  Guys, please. This is a tail-recursion and it won't be any slower than a loop. Finally it IS a loop after the Jitter does its work. And even if not, a few function calls doesn't hurt. Beside the stupid case for n<0, this is the one and only clean solution. Reason for my vote of 1 Besides, recursion for the sake of r... victorbos18-Oct-11 3:23 victorbos 18-Oct-11 3:23  Reason for my vote of 1 Besides, recursion for the sake of recursion is never a good idea Reason for my vote of 1 The time has long since passed when ... Chris Maunder4-Oct-11 2:47 Chris Maunder 4-Oct-11 2:47  Reason for my vote of 1 The time has long since passed when a recursive solution for calculating factorials was acceptable. A standard and simple solution, my 5. However, the original ... Ed Nutting3-Oct-11 20:24 Ed Nutting 3-Oct-11 20:24  A standard and simple solution, my 5. However, the original would technically be faster as loops run faster than recursive calls to methods. This is due to the (comparatively) big overhead in time of making a method call. Something to bear in mind if your going for optimisation/speed, Ed

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