`var` is still there, but it is scoped differently - `let` scopes to blocks, e.g. if (foo) { let baz = 'quux'; ... } `let` in function scope is the same as `va

`var` is still there, but it is scoped differently - `let` scopes to blocks, e.g. if (foo) { let baz = 'quux'; ... } `let` in function scope is the same as `var`, in block scope it's narrow, it's basically the thing you want. `var` couldn't change, though, it would have broken existing code - hence `let`/