Menu
Coddy logo textTech
START LEARNING
flag En iconEnglishdown icon

What is Ruby?

Part of the Fundamentals section of Coddy's Ruby journey — lesson 1 of 88.

Ruby is a dynamic, object-oriented programming language designed for simplicity and productivity. Created by Yukihiro Matsumoto in the mid-1990s, Ruby emphasizes elegant syntax that is natural to read and easy to write, making it a favorite among developers for web development, automation, and scripting.

challenge icon

Challenge

Easy

Press the run code button to run your first code in Ruby

Try it yourself

puts "Welcome to Ruby programming!"

All lessons in Fundamentals

1Introduction to Ruby

What is Ruby?Hello WorldComments in Ruby

4Operators Part 2

Logical Operators Part 1Logical Operators Part 2Recap - Simple LogicLogical Operators Part 3Logical Operators Part 4

7Bill Split Calculator

Welcome MessageGetting User InputProject lessonCalculating Tip And TotalProject lessonSplitting The BillProject lessonFormatted OutputProject lesson

10FizzBuzz with a Twist

Game OverviewThe FizzBuzz MethodProject lessonLooping Through NumbersProject lessonAdding The TwistProject lesson

13Arrays Advanced

Array Slicing with RangesArray Slicing with IndexesArray OperatorsInclude? Method

16Final Challenges

Flat Asterisk PyramidPattern FinderWhat To Buy

2Variables and Data Types

Numbers and VariablesString Data TypeBoolean Data TypeSymbol Data TypeChecking Data TypesNaming ConventionsRecap - Variable Creation

5Decision Making

If StatementIf - ElseRecap - Simple CalculatorNested If - ElseUnless Statement

8Loops

For Loop with RangesWhile LoopBreakNextRecap - FactorialTimes LoopUntil LoopNested LoopsRecap - Dynamic Input

11Arrays

Creating ArraysAccessing Array ElementsModifying ArraysArray MethodsRecap - Product ArrayRecap - Reversed ArrayArray Shortcuts

14Hashes

Creating HashesAccessing Hash ElementsModifying HashesHash MethodsRecap - Product HashSymbols as Hash Keys

3Operators Part 1

Arithmetic OperatorsModulo OperatorArithmetic ShortcutsRecap - Simple MathComparison Operators

6Basic IO

Output with putsOutput with print and pOutput With VariablesInput with getsChomp MethodType ConversionRecap - Age CalculatorRecap - True or False

9Methods

Defining a MethodMethod ParametersReturn ValuesRecap - Sigma MethodRecap - Validation MethodDefault Parameter Values

12Iterating Over Collections

Each IteratorEach with IndexIterating Over StringsMap and Collect

15Daily Expense Tracker

Project OverviewExit The ProgramProject lessonAdd ExpenseProject lessonView All ExpensesProject lessonTotal And AverageProject lessonClear AllProject lessonError HandlingProject lesson