REPLs

Introduction

The Interactive Ruby Shell, more commonly known as IRB, is one of the most important tools for a new developer. IRB allows you to quickly test small bits of code without having to create new scripts. IRB is a type of repl.

To get it up and running, all you need to do is type the following into a terminal prompt:

irb

This launches IRB. Inside, you can perform basic ruby methods, like adding two numbers:

You can also create variables:

You can leave irb by typing exit

Pry

Pry is a slightly nicer repl; it's color-coded and formats output nicely for us. Install pry by running:

gem install pry

Start pry by just typing:

pry

(You leave in the same manner, exit)

Oh the colors! :)