tgamma
From cppreference.com
| Defined in header <math.h>
|
||
| float tgammaf( float arg );
|
(since C99) | |
| double tgamma( double arg );
|
(since C99) | |
| long double tgammal( long double arg );
|
(since C99) | |
Computes the gamma function of arg.
Contents |
[edit] Parameters
| arg | - | floating point value |
[edit] Return value
The value of the gamma function of arg, that is ∫∞
0targ-1
e-t dt.
If arg is a natural number, tgamma(arg) is the factorial of arg-1.
[edit] Exceptions
If arg is negative, domain error may occur and FE_INVALID may be raised.
If arg is zero, pole error may occur and FE_DIVBYZERO may be raised.
If arg is too large, range error may occur and FE_OVERFLOW may be raised.
If arg is too small, range error may occur and FE_UNDERFLOW may be raised.
[edit] Notes
Many implementations calculate the exact integer-domain factorial if the argument is a sufficiently small integer.
[edit] Example
| This section is incomplete Reason: no example |
[edit] See also
| (C99)
|
natural logarithm of the gamma function (function) |
[edit] External links
Weisstein, Eric W. "Gamma Function." From MathWorld--A Wolfram Web Resource.