diff options
Diffstat (limited to 'man3/lgamma.3')
| -rw-r--r-- | man3/lgamma.3 | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/man3/lgamma.3 b/man3/lgamma.3 index 1692b748f5..224476286b 100644 --- a/man3/lgamma.3 +++ b/man3/lgamma.3 @@ -27,7 +27,9 @@ Compile with \-std=c99; link with \-lm. For the definition of the Gamma function, see .BR tgamma (3). .PP -The \fBlgamma\fP() function returns the natural logarithm of +The +.BR lgamma () +function returns the natural logarithm of the absolute value of the Gamma function. The sign of the Gamma function is returned in the external integer \fIsigngam\fP declared in @@ -37,13 +39,21 @@ when it is negative. .PP Since using a constant location .I signgam -is not thread-safe, the functions \fBlgamma_r\fP() etc. have +is not thread-safe, the functions +.BR lgamma_r () +etc. have been introduced; they return this sign via the parameter .IR signp . .PP -For non-positive integer values of \fIx\fP, \fBlgamma\fP() returns HUGE_VAL, +For non-positive integer values of \fIx\fP, +.BR lgamma () +returns HUGE_VAL, sets \fIerrno\fP to ERANGE and raises the zero divide exception. -(Similarly, \fBlgammaf\fP() returns HUGE_VALF and \fBlgammal\fP() returns +(Similarly, +.BR lgammaf () +returns HUGE_VALF and +.BR lgammal () +returns HUGE_VALL.) .SH ERRORS In order to check for errors, set |