The in keyword can be used in two different ways depending on the context:

 

(1)  One of five possible modes for an interface port (the other four are inout, out, buffer, and linkage); the in mode indicates a port which can be used only for input; and

(2)  An optional word in a constant declaration.

 

LRM

    1.1

 

See also

image\diamond.gif  Constant

image\diamond.gif  Objects, Data Types and Operators