Basics of ZPL

ZPL Procedures

•Procedures have form:

procedure <name> ({<params>}) {:Type};

<statement>;

•Parameters are listed with their type separated by commas:

procedure F(A, B : [R] byte, x : float): float;

•Values are returned with return … ;

•Parameters are “called by value” as the default, but by prefixing with var they can be called by reference

procedure G(var A : [R] integer, big : integer);