Hi all, I need some help in understanding some basic concept. The book Programming Clojure on pages 134 - 136 deals with tail recursion and self-recursion using recur. The tail recursive example blows the stack while the self-recursive function using recur presented on page 135 does not. On page 136 the book says that "the critical difference between tail-fibo (tail recursion) and recur-fibo (self-recursion using recur) is on line 7, where recur replaces the call to fib." Why does recur make such a difference in the way the function consumes resources? What really is the difference between a tail-recursive function and a recursive function using recur? Thanks for your help. -h.
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