![]() Note that stackoverflow is UNDEFINED BEHAVIOR and can't be caught as exception like bad_alloc, While iterative implementations may require more memory for large inputs. * However, recursive implementations can be prone to stack overflows if the recursion depth becomes too large, * Both methods work by breaking down the problem into smaller subproblems until a base case is reached,Īt which point the results are combined to get the final answer. * This can be done iteratively, as in the heap implementation, or recursively, as in the stack implementation. * For example, the factorial of 5 is 5 * 4 * 3 * 2 * 1, which equals 120. * To calculate the factorial of a number, you simply multiply all the numbers from 1 up to that number together. * because they are more efficient and use less memory compared to recursive approaches.Įxplanation of how a factorial is calculated normally * Additionally, iterative approaches for computing factorials are generally preferred when using heap memory * defeating the purpose of using heap memory in the first place. * Recursive calls to heap-based memory would still result in the same stack overflow issues, That can occur with large recursive function calls. * Moreover, In theory, you could use recursion to implement the factorial function using heap memory,īut it would not be practical since the purpose of using heap memory is to avoid stack overflow errors In such cases, it may be necessary to use an iterative approach on the stack or use the heap for dynamic memory allocation. * That being said, there are cases where an iterative approach may be preferred over a recursive approachĭue to limitations such as stack overflow. Simpler to express the problem in terms of smaller sub-problems. * the recursive approach is more commonly used to implement factorial since it is more natural and * While it is possible to implement factorial using an iterative approach on the stack as well, Why we use recursion with Stack and Iterative approach with Heap here:
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