Naming conventions Data types in code Naming conventions When you name FirstClass objects such as forms and fields, and code elements such as variables, constants, and subroutines, these names must: •       begin with a letter •       contain only letters, numbers, and the underscore character (_) •       be no longer than 255 characters •       differ from the names of BASIC operators and logical operators such as OR, AND, MOD, and NOT. Examples: •       Form •       frm •       FileOpen •       frmFileOpen •       Checkbox •       chk •       ReadOnly •       chkReadOnly Top Data types in code Each variable in your code has a data type that determines what kind of data that variable can store. For example, string variables store text strings, and Integer variables store whole numbers. Before you can use a variable in your code, you must declare it and its data type. This ensures that a variable only contains a value of the expected data type (for efficiency, FCAS does not support variables that can contain ambiguous data types). Top