[still_grokking]

  fib = 0 fby ( 1 fby fib + next fib );

That's how this would look in a data-flow language.

"fby" means "flowed by". It constructs a stream.

So you can be quite terse without loosing the clarity just by using the right abstraction.

Example taken form:

https://en.wikipedia.org/wiki/Lucid_(programming_language)