Give a recursive algorithm to reverse a string s. Note: The reversal of "a" is "a". The reversal of "ab" is "ba". The reversal of "bba" is "abb".
Added by Crystal G.
Close
Step 1
Base case: If the string s has only one character, return s itself. Show more…
Show all steps
Your feedback will help us improve your experience
Ivan Kochetkov and 91 other AP CS educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Give a recursive definition of the reversal of a string. [Hint: First define the reversal of the empty string. Then write a string $w$ of length $n+1$ as $x y,$ where $x$ is a string of length $n,$ and express the reversal of $w$ in terms of $x^{R}$ and $y . $]
Induction and Recursion
Recursive Definitions and Structural Induction
A palindrome is a string that reads the same forward and backward. Describe an algorithm for determining whether a string of $n$ characters is a palindrome.
Algorithms
Write an algorithm that reverses the sequence $s_{1}, \ldots, s_{n}$ Example: If the sequence is $\begin{array}{lll}\text { AMY } & \text { BRUNO } & \text { ELIE, }\end{array}$ the reversed sequence is $\begin{array}{lll}\text { ELIE } & \text { BRUNO } & \text { AMY. }\end{array}$
Introduction
Recommended Textbooks
Computer Science and Information Technology
Introduction to Programming Using Python
Computer Science - An Overview
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD