1 files changed, 4 insertions, 0 deletions
diff --git a/doc/func.1 b/doc/func.1
index 364cdf6..a5df513 100644
--- a/doc/func.1
+++ b/doc/func.1
@@ -31,3 +31,7 @@ Convert radians to degrees.
 .TP
 .B rad
 Convert degrees to radians.
+.
+.TP
+.B fac
+Factorial (!) function.