JavaScript has only one numeric data type and only one Date data type.

The prototypes in this API Reference include a variety of other data types in the method and property descriptions. These types are internal M-Business Anywhere data types. Distinct numeric data types such as UInt32 (unsigned 32-bit integer) are reported here to give an idea of the size and precision of data that may be supplied. Distinct data types related to date and time (Date, Time, Timestamp) are reported so that you can write code to extract the required information from the supplied data if necessary.