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<< Click to Display Table of Contents >> Navigation: Explain™ Control Language > Explain™ fundamentals > Global variables |
To get around the local variable problem, you can create a global variable. Global variables are declared outside a function and are visible throughout the entire script. You declare global variables outside a function using the keyword global. For example:
global GVar
or
global GVar = 5
Using global variables, you can keep status information past the end of a function. Making RepRate a global variable fixes the problem described under Local variables:
global RepRate
function SetSpeed(NewValue)
if (NewValue ne NIL)
RepRate = NewValue
else
RepRate = RepRate+1
return
function Main()
SetSpeed(1)
while (RunExperiment() eq 0) ; return of zero = experiment was ok
SetSpeed(NIL) ; go faster by incrementing RepRate
... ; continue after loop