Contents
Can a recursion algorithm be converted to iterative?
Even using stack will not convert a recursive algorithm into iterative. Normal recursion is function based recursion and if we use stack then it becomes stack based recursion. But its still recursion. For recursive algorithms, space complexity is O (N) and time complexity is O (N).
How to eliminate recursion at the end of a function?
One pattern to look for is a recursion call at the end of the function (so called tail-recursion). This can easily be replaced with a while. For example, the function foo: ends with a call to foo. This can be replaced with: which eliminates the second recursive call.
How to convert a recursive function to a tail?
There is a general procedure for converting to a tail recursive style; there is also a general procedure for turning tail recursive functions into loops. Just killing time… A recursive function
Is there a way to mimic recursion in iteration?
Well, in general, recursion can be mimicked as iteration by simply using a storage variable. Note that recursion and iteraction are generally equivalent; one can almost always be converted to the other.
What is the difference between linear recursion and iteration?
Such a process is called a linear recursive process. By contrast, the second process does not grow and shrink. At each step, all we need to keep track of, for any n, are the current values of the variables product, counter, and max-count.
Can a recursive call be discarded in an iterative process?
But in an iterative process, the earlier state can be discarded. This is possible in the example code because all the information needed is passed as parameters in the recursive call. The variables in the outer call are no longer needed, so nothing needs to be kept on a stack.
Is the process of fact-iteras iterative or recursive?
It may seem disturbing that we refer to a recursive procedure such as fact-iteras generating an iterative process. However, the process really is iterative: Its state is captured completely by its three state variables, and an interpreter need keep track of only three variables in order to execute the process.