3.5. Circumventing Type Checking

We learned earlier that ActionScript 2.0's type checking is an "opt-in" system. That is, type checking occurs only when the programmer supplies type information (i.e., declares an item's datatype) in a program's source code. If you are masochistic and prefer to check your code manually for type errors, simply do not declare type information for variables, properties, parameters, and return values. When no type information is supplied for a data container, the compiler skips type checking for it. For example, the following code creates a variable, x, but does not declare x's datatype:

var x = 10;