Where:
:'''InputName''' - an expression specifying the input name. The input name can consist of letters, underscore characters, numbers, and periods. The input name ''cannot'' begin with a number or a period and is not case-sensitive.
::The input name can consist of letters, underscore characters, numbers, and periods.
::The input name cannot begin with a number or a period and is not case-sensitive.
== Example ==
Declare Length as a Numerical Simple function input: