I am a very beginner user of Processing. I am using Daniel Shiffman's library to decode QR codes, and I would like to add some lines in the code to retrieve the decoded string from the QR image as a variable to use in an 'if' argument. In this way if the decoded string matches some given strings I could use it as a trigger for another action.

As I am a beginner, this action would be (for now) to simply print the string.

I tried using it like this:

}

and all that I get is a "The left-hand side of an assignment must be a variable".

Thanks in advance for any help