feature request, variables

[freecc]

I want to design something and am not sure of the space in some areas between moving parts. I would like to be able to create a variable "space" and fill in dimensions as 20+space. And then if I want to change this space I can just do it with this variable and all places I use it would be affected.

So a list with variables to be used when you fill in the numbers is my request. I think it would be useful.

[Jee-Bee]

https://www.freecadweb.org/wiki/Expressions

[Vincent B]

or here?
https://forum.freecadweb.org/viewtopic.php?t=31137

[chrisb]

Expressions as mentioned above go well together with Spreadsheets from the Spreadsheet Workbench.

[freecc]

thanks for helping!