String operands
String operands can be any literal string (enclosed in single or double quotes), any variable that represents a string (does not require delimiters in this context), any function call that returns a string, or any combination of these, concatenated using the + operator.
For example, "<h2>" + Component.Title + '</h2>' is a concatenation of the literal string <h2>, the variable Component.Title, and the literal string </h2>.
For example, the following are all valid string operands:
Component.TitlePage.Title + ": " + Component.Title"<p>" + RenderComponentPresentation(Component.ID, "tcm:4-88-32") + "</p>"