Learn Ruby the Hard Way

Preface
Acknowledgments
The Hard Way Is Easier
Exercise 0: The Setup
Exercise 1: A Good First Program
Exercise 2: Comments and Pound Characters
Exercise 3: Numbers and Math
Exercise 4: Variables and Names
Exercise 5: More Variables and Printing
Exercise 6: Strings and Text
Exercise 7: More Printing
Exercise 8: Printing, Printing
Exercise 9: Printing, Printing, Printing
Exercise 10: What Was That?
Exercise 11: Asking Questions
Exercise 12: Prompting People for Numbers
Exercise 13: Parameters, Unpacking, Variables
Exercise 14: Prompting and Passing
Exercise 15: Reading Files
Exercise 16: Reading and Writing Files
Exercise 17: More Files
Exercise 18: Names, Variables, Code, Functions
Exercise 19: Functions and Variables
Exercise 20: Functions and Files
Exercise 21: Functions Can Return Something
Exercise 22: What Do You Know So Far?
Exercise 23: Read Some Code
Exercise 24: More Practice
Exercise 25: Even More Practice
Exercise 26: Congratulations, Take a Test!
Exercise 27: Memorizing Logic
Exercise 28: Boolean Practice
Exercise 29: What If
Exercise 30: Else and If
Exercise 31: Making Decisions
Exercise 32: Loops and Arrays
Exercise 33: While Loops
Exercise 34: Accessing Elements of Arrays
Exercise 35: Branches and Functions
Exercise 36: Designing and Debugging
Exercise 37: Symbol Review
Exercise 38: Doing Things to Arrays
Exercise 39: Hashes, Oh Lovely Hashes
Exercise 40: Modules, Classes, and Objects
Exercise 41: Learning to Spe