Update README.md

Author: mohebifar

README.md

@@ -16,10 +16,10 @@ To use this package add `ngPersianTools` as a dependency to your app module, the
 
     var app = angular.module('myApp', ['ngPersianTools', /* Other deps ... */]);
 
-Convert Numbers to Persian Representation
+Convert Numbers to Persian Digits
 -------------------------
 
-You can use `pnumber` filter to convert the numbers to persian form :
+You can use `pnumber` filter to convert the digits to persian or arabic form :
 
     {{ product.price | pnumber }}
     <!-- e.g. Raw value: 2500, Output: ۲۵۰۰ -->
@@ -28,3 +28,12 @@ You can mix this filter with `currency` and `number` filters :
 
     {{ product.price | currency | pnumber }}
     {{ product.quantity | number | pnumber }}
+
+
+Convert Numbers to Persian Words
+-------------------------
+
+You can use `toPWord` filter to convert numbers to persian words.
+
+    {{ product.price | toPWord }} ریال
+    <!-- e.g. سیصد و پنجاه هزار ریال -->