Since Armed Assault the convention to use quotation marks for Strings and curly braces for Code has been formalised. Exceptions, however, do exist: for example bindKey (VBS2), onMapSingleClick and onDoubleClick. When scripting '...', "..." or ""..."" generally indicates data type String, and {...} indicates data type Code.

In OFP many language constructs (including forEach, if, while) use the concept of "code strings". Code is passed as a string to them and they interpret it as code if they wish. Since version 1.85, string constants can be written in two ways: Using double quotes (like "Hello") or curled braces (like {a=a+1}).

A partial list of commands which expect code as parameter is provided at Code Commands.