Update README.md

Author: comcxx11

README.md

@@ -23,6 +23,7 @@ The usage is very similar to `UITextField` text properties.
 lblAmount.text(num:192398)
 ```
 
+Default Currency Symbol is `dollor` Sign
 ```swift
 lblAmount.setCurrency(symbol: "￦")
 lblAmount.text(num:192398, showCurrency:true)