Re: LIterate programming with calc (help)

["Fraga, Eric" <e.fraga@ucl.ac.uk>]

On Sunday, 23 Oct 2022 at 14:15, Ypo wrote:
> Is it possible to express in a calc block some basic operations with
> variables and non-predefined units?

> Why A*c won't show an arithmetic result, but ~: A c ~?

I've never managed to get calc blocks define variables.  The equations
you have typed in are "equations" in the mathematical sense, not
assignment statements.

> Is it possible to work with the "$" unit?

$ means something specific in calc (cannot remember what).  I use "USD"
instead, for instance, and it works fine.

The following single line calc block does do what you want:

#+begin_src calc
  solve([a = 300 m, b = 300 m, Area = a*b, cost = 1 (USD/m^2), z = Area*cost], [a, b, Area, cost, z])
#+end_src

#+results:
: [a = 300 m, b = 300 m, Area = 90000 m^2, cost = USD / m^2, z = 90000 USD]

-- 
: Eric S Fraga, with org release_9.5.5-966-g88c85d in Emacs 29.0.50