22a. Recursion

• 22a. Fibonacci

Introduction to recursion using Fibonacci numbers.

• 22a. Digits

Counting the digits in a number.

• 22a. Sum Digits

Sum the digits in a number.

• 22a. Fibsum

Sum of Fibonacci numbers.

• 22a. More Recursion

Many more recursion practice problems.

• 22a. Harmonic

Short review question.

• 22a. Practice++

More practice: sum of sevenths, sum of y-coordinates on a parabola.

• 22a. ss3

A short summing practice problem.

• 22a. Recursive Helpers

Exercises involving recursive functions with helper functions.

• 22a. Recursion Quiz Practice

Quiz practice: hawaiian-earring, double-ss, math-mess.

• 22a. Recursion Quiz 2018

First quiz on recursion: reciprocal-squares, blank-vowels, hollow-diagonal.

• 22a. Recursion Practice I 2019

A quiz on recursive functions.

• Roygbiv Code

We are going to write an encoding function that makes an image like a bar code, but using colored rectangles insteada of bars.

• 22a. Strings

A presentation with exercises involving recursion on strings.

• 22a. Helpers

Real introduction to helper functions in recursion.

• 22a. Helpers: Count Divisors

A complete lecture on count-divisors.

• 22a. Recursion Practice 3

Even more recursion practice.

• 22a. Recursion Self Quiz

A brief quiz to make sure you understand recursion.

• 22a. Recursion Practice 4

Change penguin to penguins and mouse to mice in zoo-1, sum5, double-middle.

• 22a. Mini-Quiz

ex-it, unlucky

• 22a. Recursion Quiz 2

Ice cream quiz.

• 22a. Recursion Practice 5

count-w, powers of 7, double zero

• 22a. Recursion Practice 6

r-ss - does a word have r or ss?, no-7, abfx - all but first x becomes a y.

• Quiz 3 (Hard)

A harder quiz based on the skills we have learned: english-q

• Quiz 4 (Medium)

ssm, pairorder

• 22a. Hangman Project

Make the classic game of hangman.