The following variable is a single-precision value by default:ABCVariables beginning with FN are assumed to be calls to a user-defined function.The GW-BASIC statements DEFINT, DEFSTR, DEFSNG, and DEFDBL may be included in a program to declare the types of values for certain variable names.6.2.3 Array VariablesAn array is a group or table of values referenced by the same variable name.