Is there a "return statement" in Openscad, to avoid a mess of nested ifs? Something like this (return replaces the if mess to avoid the ring being plotted): module plateOrRing(plate = false) { if (plate) { cube(20, center=true); // RETURN prematurely so the ring is not plotted // return(); } // *** // IF MESS REPLACED BY return STATEMENT: // if (!plate) { // *** // if not "plate", plot a ring translate([0, 0, 10]) difference() { cube(20, center = true); translate([0,0,20]) translate([0,0,-20]) scale([1,1,3]) cube(10, center = true); }; // difference // } // IF MESS REPLACED } // plateOrRing()

if (plate) { // do something } else { do something else }. There is also if() // else if() // else when you have more than two possibilities. https://openscad.org/cheatsheet/ Dan On Sat, Oct 28, 2023 at 5:47 PM Jim Witte <jim.witte@gmail.com> wrote: > Is there a "return statement" in Openscad, to avoid a mess of nested ifs? > Something like this (return replaces the if mess to avoid the ring being > plotted): > > module plateOrRing(plate = false) { > if (plate) { > cube(20, center=true); > // RETURN prematurely so the ring is not plotted > // return(); > } > // *** > // IF MESS REPLACED BY return STATEMENT: > // if (!plate) { > // *** > // if not "plate", plot a ring > translate([0, 0, 10]) > difference() { > cube(20, center = true); > translate([0,0,20]) > translate([0,0,-20]) scale([1,1,3]) cube(10, center = true); > }; // difference > // } // IF MESS REPLACED > } // plateOrRing() > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >

On 10/28/2023 8:47 AM, Jim Witte wrote: > Is there a "return statement" in Openscad, No.

if (true) {
    echo("a");
    cube();
    assert(false);
}

echo("b");
x = echo("c");

On 10/28/2023 9:56 AM, Jordan Brown wrote: > On 10/28/2023 8:47 AM, Jim Witte wrote: >> Is there a "return statement" in Openscad, > > No. While that answers your question, I should perhaps add a suggestion:  if the size of an "if" block bothers you, consider refactoring it out into its own module. Why isn't there a return statement? I can't really answer that, but I can tell you that it is just the tip of the iceberg in ways that OpenSCAD is not like most programming languages.    A return statement would make some of those differences even more obvious. Try this: if (true) { echo("a"); cube(); assert(false); } echo("b"); x = echo("c"); What result did you expect?  What result did you get?  Why?