[IanCal]

Interesting, you might want to look at the suggested code though, maybe play through with some beginners?

    function init(robot){
        robot.number = 0;
    }

    function loop(robot){
        robot.jump();
        if(robot.number++ % 2 == 0){
            robot.move(2);
        }
    }

This is in the second level.

Incrementing inside a check is awkward, as is just calling the variable 'number'. Perhaps something like

    function init(robot){
        robot.jump_next = true;
    }

    function loop(robot){
        if (robot.jump_next) {
            robot.jump()
            robot.jump_next = false;
        } else {
            robot.move(2);
            robot.jump_next = true;
        }
    }

[throwaway2016a]

I think the readability to an inexperienced coder greatly improves just by moving the "robot.number++" outside the conditional and perhaps even changing it to "robot.number = robot.number + 1"

Though that is slightly different (since ++ will execute after the conditional is evaluated when following the lval but the change will make it run before)

Edit: on 2 seconds though... put that code AFTER the if statement and it would behave exactly as the example.

[styfle]

The first snippet calls robot.jump() every loop. The second doesn’t not.

[IanCal]

True, although as someone else points out (contrary to what I thought) only the last runnable action is done.

If that wasn't the case, then swapping things around to be something more like "move_next_turn" would be clearer I think.

[reaal]

Very true, it is much easier to understand with a boolean, thanks!