Setting from a variable

[batnoob]

is it possible to do something like:

Code: Select all

set x=4
set equation="%x%*2"
set /a x=!equation!
echo x= %x%

and output

Code: Select all

x= 8

More simply, how would one go about letting the user input the operations to be performed on a variable?
(or is that possible?)

Thanks,
::BatNoob
'BatNoob
//BatNoob

[aGerman]

No need to expand a variable in a SET /A statement. The cmd.exe will do that internally.

Code: Select all

@echo off &setlocal
set /p "x=x: "
set /p "formula=formula: "
set /a "y=%formula%"
echo y=%y%
pause

Input 2 if you're prompted for x and x*2 if you're prompted for the formula.

Steffen

[Aacini]

@batnoob, perhaps you could be interested in this thread...

Antonio

[batnoob]

Thank you both, I thought it was simple, but I couldn't remember how to do it to save my life.