Jon Pretty

if / fi — start/end of a conditional block (Bash) case / esac — start/end of a pattern match (Bash) od / do — start/end point of an action (Polish)

Have you learned Polish entrance/exit?

I just checked... it might take me a while to learn the difference. However...I have a great trick: if you're already inside, and you see a w–jście, it's an exit, and if you're outside and you see a w–jście, it's an entrance!