On Wed, Nov 20, 2013 at 12:09 PM, Bo Gus <[email protected]> wrote: > My tail recursive implementation of length is like this: > > (define (length2 l) > (define (l-iter l count) > (if (null? 1) count > (l-iter (cdr l) (+ count 1)))) > (l-iter l 0))
> I am fairly new to scheme. What am I doing wrong? You wrote (null? 1), which is always false. Note 1 instead of l. Cheers ____________________ Racket Users list: http://lists.racket-lang.org/users
