# Exact factorial/gamma values for half-integers

is it possible to return exact values of (n+1/2)! and ?(n+1/2) for *n* is an integer?

Exact factorial/gamma values for half-integers

is it possible to return exact values of (n+1/2)! and ?(n+1/2) for *n* is an integer?

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3

Sage already supports this (at least as of 4.8):

```
sage: factorial(3/2)
3/4*sqrt(pi)
sage: gamma(5/2)
3/4*sqrt(pi)
```

Ah. It doesn't for decimal inputs, like 1.5, but it does for 3/2. Thanks

2

If you give a numeric input, it'll give you a numeric output. If you want an exact output, give it an exact input.

Asked: **
2012-05-10 13:43:01 -0500
**

Seen: **500 times**

Last updated: **May 10 '12**

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