Implement a function using Verilog HDL

1. Once you have created and setup your project, the next step is to describe your design using a hardware description language.
   Go to File-->New→Select Verilog HDL File.

2. Once a new file is created, you will be able to enter your code into it. When you save it, you have to have the module name and file name match up. Remember that one of the file names must match the name of the project. Double check and make sure that the Save as type is Verilog HDL Files.