README.md in dentaku-0.2.2 vs README.md in dentaku-0.2.3

@@ -42,19 +42,27 @@
     calculator.evaluate('5 + 3 * 2')
     => 11
     calculator.evaluate('(5 + 3) * 2')
     => 16
 
-A number of functions are also supported.  Okay, the number is currently one,
-but more will be added soon.  The current function is `if`, which works like
-Excel's `if`:
+A number of functions are also supported.  Okay, the number is currently two,
+but more will be added soon.  The current functions are `round` and `if`, and
+they work like their counterparts in Excel:
 
     calculator.evaluate('if (pears < 10, 10, 20)', :pears => 5)
     => 10
     calculator.evaluate('if (pears < 10, 10, 20)', :pears => 15)
     => 20
 
+`Round` can be called with or without the number of decimal places:
+
+    calculator.evaluate('round(8.2)')
+    => 8
+    calculator.evaluate('round(8.2759, 2)')
+    => 8.28
+
+
 If you're too lazy to be building calculator objects, there's a shortcut just
 for you:
 
     Dentaku('plums * 1.5', {:plums => 2})
     => 3.0
@@ -63,10 +71,10 @@
 SUPPORTED OPERATORS AND FUNCTIONS
 ---------------------------------
 
 Math: `+ - * /`  
 Logic: `< > <= >= <> != = AND OR`  
-Functions: `IF`
+Functions: `IF ROUND`
 
 THANKS
 ------
 
 Big thanks to [ElkStone Basements](http://www.elkstonebasements.com/) for