The dontreturn function is used to delete return values from a Maple procedure.  The makevoid function deletes all return values from a Maple procedure.

The command with(codegen,dontreturn) allows the use of the abbreviated form of this command.

The command with(codegen,makevoid) allows the use of the abbreviated form of this command.

f := proc(x,A::array(1..2)) A[1] := x^2; return x,A end proc: