How to use set var and get var?

[kevinlinxc]

I can't find documentation for how to use the script variables.

I would expect to use the set var block and then the get var block and for them to be linked, but even after executing input 0 of the set var block nothing happens. Creating a variable first in the variables panel seems to do something, but I can't recreate it successfully.

What is the correct way to use variables?