if else and while in M language

There are 165 Values here and they are Comma Seperated. This step is called CommaSeperated

[![workItemList is a function which takes in the value from CommaSeperated and Brings out the table here][2]][2]

workItemList is a function which takes in the value from CommaSeperated and Brings out the table here [2]: https://i.stack.imgur.com/UdRgj.png

I want to split the 165 items in CommaSeparated into batches of 100 and call workItemList for each batch. Any ideas on how it must be done?