### Function Invocation and In-Line Functions

##### In-Line Functions

In some cases it is possible to invoke a NeXtMidas command, most importantly `CALCULATOR`, using function-like syntax on the command line of a different operation. The following words are reserved to allow the in-lining:

- CALC - To perform complex mathematical functions.
- FILE - To open, operate on, and close a file.
- SEDIT - For string operations.
- TEST - For logical tests

For example,

      nM>res x CALC(1,2,*)

Sets the result `x` to 2.

##### Function Invocation

See the `INVOKE` command to learn how to call commands NOT IN THE NEXTMIDAS COMMAND DICTIONARY from the macro language. For example,

      nM>invoke D:pi java.lang.Math.pi
      nM>invoke D:dval java.lang.Math.sin(pi)

gets `pi` and calls the static function `sin` in the Java Math class and returns the output into the result `DVAL`.