Adds symbol with "name" to symbol table. Symbols equate to variables used in other programming languages. The value of a symbol is of type variant and can contain a string, inetger or float value. Symbols are global, even those created within subroutines.
Symbols can be initialized by adding a value as a second parameter.
name: A symbol name. Symbol names can be a mix of letters and numbers, but must start with an alpha character. Symbols are not case sensistive.
value: An optional integer,
float or string value.