decimals in batch script

Question

echo off
cls

mode con: cols=55 lines=15

:MAIN
color 07
cls

set /p num1="Specify first number: "
cls
set /p num2="Specify second number: "
cls

set /a num3=%num1%*%num2%

echo %num3%
pause

Say num1 = 30 and num2= .10 then it would only display 0 and not .3 so how do I make it do decimals and how would you display out to 5 decimals places if needed?

Answer 1

Batch does not support floating point arithmetic. You have to rely on external scripts.

http://www.computing.net/howtos/show/batch-script-floating-point-math/753.html

Floating point division in a dos batch