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- What is recursion and when should I use it? - Stack Overflow
Don't use recursion for factorials or Fibonacci numbers One problem with computer-science textbooks is that they present silly examples of recursion The typical examples are computing a factorial or computing a Fibonacci sequence Recursion is a powerful tool, and it's really dumb to use it in either of those cases
- algorithm - Understanding recursion - Stack Overflow
Why, yes, recursion can be replaced with iteration, but often recursion is more elegant Let's talk about trees In computer science, a tree is a structure made up of nodes , where each node has some number of children that are also nodes, or null
- Recursion vs loops - Stack Overflow
Recursion is used to express an algorithm that is naturally recursive in a form that is more easily understandable A "naturally recursive" algorithm is one where the answer is built from the answers to smaller sub-problems which are in turn built from the answers to yet smaller sub-problems, etc
- recursion - Determining complexity for recursive functions (Big O . . .
And here the for loop takes n 2 since we're increasing by 2, and the recursion takes n 5 and since the for loop is called recursively, therefore, the time complexity is in (n 5) * (n 2) = n^2 10, due to Asymptotic behavior and worst-case scenario considerations or the upper bound that big O is striving for, we are only interested in the largest
- java - What is recursion - Stack Overflow
Recursion A method can call itself, this is recursion Recursive implementations of methods are often used, because they lead to compact elegant code, which is easier to understand than a coresponding implementation that does not use recursion The recursive programming technic knows three important rules (of thumb):
- How to understand the concept of recursion in java?
Personally, I do not like the factorial problem I find it hard to understand and I do not think it explains recursion in a clear way So lets look at a different example Lets say that we want to print numbers from 1-100 This is a very simple task with a for loop and a counter, but it can also be done with recursion For example:
- recursion - Recursive vs non-recursive - Stack Overflow
Mostly recursion is better (when it actually is) because it makes an implementation much simpler and less error-prone, and errors are by far the biggest cost in computing (But of course improperly done it can cost you big time as well ) When recursion is good it's very good When recursion is bad it's very bad
- Real-world examples of recursion - Stack Overflow
Recursion is a technique to keep breaking the problem down into smaller and smaller pieces, until one of those pieces become small enough to be a piece-of-cake Of course, after you break them up, you then have to "stitch" the results back together in the right order to form a total solution of your original problem
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