So I installed qtcreator package on ubuntu 18.10.
I found out that to get the examples, I also needed the qtbase5-examples and the qtbase5-doc-html package.
But there are still no examples shown in the drop-down menu of the Welcome screen in qtcreator.
I found people with similar problem (for example for archlinux), but trying to fix the path problem does not allow the examples to show up in qtcreator.
Aynone ?