13.1.2 Procedure statements

Procedure statements are calls to subroutines. There are different possibilities for procedure calls:

All types are present in the following diagram:

Procedure statements

--procedure statement-|---procedure identifier----|--------------------
                   |----method identifier----| -actual parameter list-
                   |-qualified method identifier|
                    ----variable reference-----

The Free Pascal compiler will look for a procedure with the same name as given in the procedure statement, and with a declared parameter list that matches the actual parameter list. The following are valid procedure statements:

WriteLn(’Pascal is an easy language !’);  

Remark: When looking for a function that matches the parameter list of the call, the parameter types should be assignment-compatible for value and const parameters, and should match exactly for parameters that are passed by reference.