hn • r/hackernews
Comment on: Jaithon 3, a fast programming language with the perfect syntax
I can't help wondering why so many new languages provide two separate mechanisms to define mutable and immutable variables.I see a value in defaulting to immutable unless explicitly stated, like in Rust. But having to choose between two different 3-letter words, like let and var, what stops one from always using var?Coming to Jaithon in particular, I also wonder what the scope of immutability is, when it allows the following: let names:list[str]=[] names.push("whatever") If a function takes a list[str] as input, how do I signal that it does or does not modify the list? And if it does, will