Tool Profile

Lean 4

Functional language and theorem prover picked as an APL successor.

At a glance:

First seen:2026-05-14

Last seen:2026-05-14

Sightings:1

Source:lean-lang.org

What it is

Functional language and theorem prover picked as an APL successor.

Why developers recommend it

One commenter said they settled on Lean 4 as the successor language for their needs.

Hacker News evidence

2026-05-14

In the APL thread, a commenter called Lean 4 the 'best language in existence' for their use case.

Saying Goodbye to one line of APL