Changes

:BASIC allows the program to define and use simple value returning functions. DEF FuNction is the definition part of this mechanism and creates program-specific function which works within the :program in the same way as a function such a COS operates as a built-in function of BASIC. It may be invoked throughout the program. Variable types must be consistent and the DEF FN :command should be written in part of the program outside the execution loop.

:Syntax : DEF FN<name>[(<formal parameters>)]=<general expression>

:Example: ''"with the definition of..."''

:''"the results are..."''

:...after 5 seconds your dropped stone falls 122.58315 metres