Improve this question. Joachim Sauer k 55 55 gold badges silver badges bronze badges. Hoon Hoon 1 1 gold badge 3 3 silver badges 8 8 bronze badges. They are not better and can easily cause StackOverflow if dataset is too large.
Whats your source? Hoon I hope your question is been answered. Please mark it as accepted. Basic stackoverflow ethics : — amod. Question might be closed as duplicate but not as not constructive — Grijesh Chauhan.
Add a comment. Active Oldest Votes. Are recursive methods always better than iterative methods in java? No Also can they always be used in place of iteration and vice-versa? Which method is more efficient? Improve this answer.
Maroun Maroun I don't agree with the premise of this answer. Readability of recursion vs iteration is a subjective matter. A technique one programmer finds most readable might not be the same for another imo. The if statement in the iteration example is unnecessary and I believe will result in the same number of cycles either way. Interestingly, if I implement this in Rust just because I kinda know it and view the assembly, the while loop's false condition jumps to the if branch instead of duplicating the return code.
Wait, are you saying iteration is always faster than recursion??? Then why am I learning recursion in school? SMH — NoName. NoName in some other languages tail recursion is optimized, so, who knows, we might see optimizations in future Java versions as well — hipokito.
Kevin Ghadyani 5, 4 4 gold badges 34 34 silver badges 51 51 bronze badges. This is why "tail recursion" in Lisp languages is usually optimized into a jump. Hence, usage of recursion is advantageous in shorter code, but higher time complexity. Iteration : Iteration is repetition of a block of code.
This involves a larger size of code, but the time complexity is generally lesser than it is for recursion. Overhead: Recursion has a large amount of Overhead as compared to Iteration. Recursion : Recursion has the overhead of repeated function calls, that is due to repetitive calling of the same function, the time complexity of the code increases manifold.
Iteration : Iteration does not involve any such overhead. Infinite Repetition: Infinite Repetition in recursion can lead to CPU crash but in iteration, it will stop when memory is exhausted. Recursion : In Recursion, Infinite recursive calls may occur due to some mistake in specifying the base condition, which on never becoming false, keeps calling the function, which may lead to system CPU crash.
Iteration : Infinite iteration due to mistake in iterator assignment or increment, or in the terminating condition, will lead to infinite loops, which may or may not lead to system errors, but will surely stop program execution any further.
Property Recursion Iteration Definition Function calls itself. A set of instructions repeatedly executed. Application For functions. For loops. Asked 7 years, 5 months ago. Active 2 years, 2 months ago. Viewed 37k times. Improve this question. Aviv Cohn Aviv Cohn Try implementing QuickSort without recursion. It can be done -- I've done it -- but doing so will give you a better understanding of why recursion.
The recursive version can not only be more readable, it can also be more writable. While this is generally a lesser factor than readability code is read far more often than it is written , it does matter since all good programmers are lazy ;- The overarching advantage is that the recursive version is usually simpler , and this reflects on both reading and writing the code.
Recursion lets you use immutable values. A loop is a statement and returns no value; the only way it can achieve anything useful is through side effects. Immutability in turn makes reasoning about code easier. Iteration is a fixed control flow. Recursion may appear in a dynamic control flow think virtual method calls , which is not possible to translate to iteration directly.
Odd question. Iteration and recursion are not logically equivalent and thus pointless to compare as such. Add a comment. Active Oldest Votes. Well, it's usually less code. And to the extent that it's less code, it's less error-prone. Improve this answer. It's an old question but I wanted to ask something about this: you said "the compiler already manages a stack". Did you mean: "the runtime system [i. As far as I understand the compiler emits instructions that explicitly or implicitly manipulate the call stack e.
The call stack is implemented in the runtime system. Am I wrong? The compiler needs to know on some level how to work with that stack. Practice questions on recursion. MCQ on Recursion. Reverse a linked list using recursion. Print fibonacci series using recursion. Programming questions on tree. Linked List Problems.
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