How to set the value to the Datatable ?

[Uma]

Hi,
I am getting a value through input box and I am storing that in a variable.
I am getting this my value thru input box,

Code:

Dim i
i=inputbox("enter sysenv")

I need to store this i value to global data table for furthur Action use.
I am able to see lot of examples that,how to set the direct values to the global or local data sheet.

How to set this variable "i"-Value to the global data table?
Any Help?
Thanks
Uma