request 0 or 1 best opportunity

[AndreasP92]

Hi,

I want to request if a scanned variable is 0 or 1.

When 1: next step

When 0: false, call sequence or something like that

What´s the best oppurtinity to check it?

If/else?

Expressions?

Extra Statement Step?

Kind Regards,

Andreas

[SercoSteveB]

For me it would come down to the number of steps I wanted to run (or not run) depending on the state of the variable.  If it were a single step then I would go for a PreCondition (see PreConditionBuilder) on that step, for multiple steps I would go for an If/else. 

NOTE:  PreConditions are cool, but you sacrifice a little readability.

[AndreasP92]

Hi,

thanks for your reply. But the Preconditon expected Boolean, but found a Number (because my variable is a number variable with 0 or 1).

Can I "Change" the numbers into a boolean?

Kind Regards,

Andi

[SercoSteveB]

Hi Andi

Yes, a PreCondition evaluates an expression that needs to result in a Boolean.  For your purposes (numeric), your PreCondition needs to be an expression that tests the value of your numeric in a way that gives you a Boolean result.  Here are a few PreCondition examples hopefully one will suit you purposes:

Locals.YourVariableHere == 0 (Run the step if your variable equals 0)

Locals.YourVariableHere != 0 (Run the step if your variable does not equal 0)

Locals.YourVariableHere > 0 (Run the step if your variable is any positive number greater than 0)

Locals.YourVariableHere <= 4 (Run the step if your variable is less than or equal to 4)

(Locals.YourVariableHere == 1) || (Locals.YourVariableHere > 3) (Run the step if your variable is equal to 1 or is greater than 3)

Regards

Steve

[AndreasP92]

Hi Steve,

thanks, it helps me a lot.

Regards