Usually when a person is making stuff in Dynamo, they aren't making just one or 2 things. More often than not, you are actually making a ton of stuff, series or related ranges of items. This can require inputting lists of numbers to position and arrange your stuff.
Some standard nodes exist for this, namely Number Range and Number Sequence
I've been seriously exploring Dynamo for a few weeks now, after wanting to do so ever since I first read about it many months (or years?) ago. There have been many short lived attempts earlier, but this has been my most sustained, so far. It started with reading Programming for Non-Programmers - Dynamo Visual Programming and trying out the various
Dynamo 0.6.0 takes a big step into the future with the ability to easily share functionality between users. Dynamo already had the ability to create custom nodes by collapsing collections of functions into single nodes. This allows users to create their own libraries of repeated or more generic workflows that they do not want to rebuild over
For those of you who are looking at visual programming using Dynamo, please take the time to visit David Wood's very awesome bimwood blog (formerly the Revitator).He is covering some very good territory around applications and concepts of visual programming in BIM in language that should be accessible to all.Thanks David!
Dynamo lends itself to the creation of fractals (and other recursive geometry) thanks to the recursive capacities of Custom Nodes:
I wrote an in-depth tutorial on the subject over here: http://steellworks.blogspot.com/2013/08/dynamo-fractals.html