How do I add a string to an existing string based on the value of a variable

Hi there,
I’m a newbie to make.com.I’m preparing a message to a user based on a given task, and calculate if the task due date has already passed by subtracting the current time from the due date. If the result is greater than zero I suppose to add some text. How do I do that? How do I add a text to another text based of the value of a variable?

Thanks for any help!

Place your existing text first, in the area you want to conditionally add extra text, use an if() to check if the value is greater than 0, and if so, place desired text. Using Set Variable will allow your new value to overwrite your existing value of Text.