1 Obi-Wan {Force ghost}: So what I told you was true... from a certain point of view.
2 Luke: No it’s not! It was just complete hooey! Flim-flim! Malarkey!
3 Luke: I thought the Jedi Code said to not form attachments and to behave ethically and stuff! It’s like 99% of what you told me is utter hogwash!
4 Obi-Wan: Oh, the Jedi Code allows blatant lying.

The Jedi Code is a vaguely alluded-to code of behaviour for Jedi in Episodes I, II, and III. In the films it is stated that the code forbids taking more than one Padawan learner at a time, forming attachments, seeking revenge, killing unarmed opponents, or falling in love with an individual. It's also said to encourage emotional detachment in order to avoid feelings of jealousy, greed, and the fear of loss.

All of this makes it sound like the Jedi Code is some detailed legal-style text, with many clauses and big lists of bullet-pointed subclauses.

But when you look it up and find out what the Jedi Code really says, it's this:

There is no emotion, there is peace.
There is no ignorance, there is knowledge.
There is no passion, there is serenity.
There is no chaos, there is harmony.
There is no death, there is the Force.

That's it, that's the whole text of the Jedi Code. Nothing specific about avoiding love, or killing unarmed opponents, or teaching multiple Padawans at once. Basically, all of that stuff in the movies was interpreted - i.e. made up - based on a few vague words.

If you interpret this code as meaning you're not allowed to love another person, then it must also be against the Jedi Code to die.