How to define the parameter in the IF loop

hi team,

We are trying with the IF loop in the CBTA and we are not sure of what and how the parameter to be defined for the IF loop.

For eg:in the ME21N tcode there is a tab called Brazil appears for only some plant.The condition we say is the :If this Brazil tab appears then enter the details in it, if it not appering ELSE save and generate the document number.

I have a few question like:

1)What is the token to be provided for "Left Operand"-Parameter name or  Ref parameter or anything else?

2)What is the token to be provided for "Right Operand"- 'True or False" or "0 or 1"?

Please find below the screenshots:

Please let us know if you are aware of the issue.

Regards,

Eswari