Recursion

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What is Recursion?

* A problem solving concept which can be used with languages that support the dynamic allocation of memory. * In programming, it is the ability for a function to call itself! * The concept has it's foundation in mathematics.

Advantage/Disadvantage of Recursion

* ADVANTAGE Usually a more concise coding solution, some solutions are more easily implemented using recursion * DISADVANTAGE Less efficient due to overhead involved with function calls.

A Walkthru of Recursive Code

* Run Time Stack * Winding and Unwinding the stack * Local variables, parameters, return values stored on the stack

Two Requirements for Recursive Code

* There must be an anchor point. (Sometimes this is called the base case.) * Each recursive call must approach the anchor point (or base case).


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