1 files changed, 32 insertions, 0 deletions
diff --git a/numeric.c b/numeric.c
index fc05c9963c..f2c8c13a97 100644
--- a/numeric.c
+++ b/numeric.c
@@ -3198,6 +3198,38 @@ fix_even_p(VALUE num)
     return Qtrue;
 }
 
+/*
+ *  Document-class: ZeroDivisionError
+ *
+ *  Raised when attempting to divide an integer by 0.
+ *
+ *     42 / 0
+ *
+ *  <em>raises the exception:</em>
+ *
+ *     ZeroDivisionError: divided by 0
+ *
+ *  Note that only division by an exact 0 will raise that exception:
+ *
+ *     42 /  0.0 # => Float::INFINITY
+ *     42 / -0.0 # => -Float::INFINITY
+ *     0  /  0.0 # => NaN
+ */
+
+/*
+ *  Document-class: FloatDomainError
+ *
+ *  Raised when attempting to convert special float values
+ *  (in particular infinite or NaN)
+ *  to numerical classes which don't support them.
+ *
+ *     Float::INFINITY.to_r
+ *
+ *  <em>raises the exception:</em>
+ *
+ *     FloatDomainError: Infinity
+ */
+
 void
 Init_Numeric(void)
 {