AP Computer Science A Flashcards: Recursion
Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026
Review key ideas with interactive flashcards. This set includes 10 cards to help you master important concepts.
If you convert an iterative solution (using a loop) to a recursive one, what in the recursive method would likely correspond to the loop's control variable?
The parameters of the recursive method would correspond to the loop's control variable, as they capture the progress of the process.
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If you convert an iterative solution (using a loop) to a recursive one, what in the recursive method would likely correspond to the loop's control variable?
The parameters of the recursive method would correspond to the loop's control variable, as they capture the progress of the process.
Define: Recursive Call
A recursive call is the statement within a method where the method calls itself to continue the repetition.
To determine the result of a recursive method, what is the key component you must identify?
You must identify the base case, as this is the condition that stops the recursion and allows the final result to be computed.
How do recursive calls handle their variables and parameters?
Each recursive call has its own independent set of local variables and parameters.
What is the purpose of a base case in recursion?
The base case is a condition that halts the recursion, preventing the method from calling itself indefinitely.
What is the role of parameter values in a recursive process?
Parameter values capture the progress of a recursive process, similar to how loop control variables capture the progress of a loop.
What is a recursive method?
A recursive method is a method that calls itself. It is another form of repetition.
In what way is recursion a form of repetition?
Recursion is a form of repetition because the method calls itself repeatedly, performing a similar set of operations with each call until a base case is met.
What is the relationship between recursive and iterative solutions?
Any solution that can be implemented recursively can also be implemented using an iterative approach, and vice versa.
What are the two essential components of any recursive method?
Recursive methods must contain at least one base case, which halts the recursion, and at least one recursive call.