There are two ways for you to script functions in Zoho CRM. Each have their own advantages. You can either,
The
editor in Zoho CRM lets you write the function code from scratch within
the product itself. The scripting and deployment is taken care of by
the editor.
You can script the code in the editor that pops up.
[Image of the editor with a small sample code]
The other way is to script the function in any programming language editor and upload the folder to CRM.
[Image of the sample code in any prog lang editor, like Eclipse]
The file that contains the function code must be in "zip" format.