Math with variables

[zipppo 0]

I have three variables the first 2 contain a number the third one is + or - how would i set up a problem that is

15 + or - 12

variable1 variable3 variable2 = variableanswer

Thanks ahead of time

Edit for the example 15 is var1 +or- is var3 and 12 is var2.

Edited February 12, 2011 by zipppo

[reb 29]

You can do it this way.

$var1 = 15

$var2 = "-"

$var3 = 12

if $var2 = "+" then

MsgBox(0,"",$var1 + $var3)

else

MsgBox(0,"",$var1 - $var3)

EndIf

[zipppo 0]

Solved Thnak's