Let’s write a function to compute factorials. The mathematical definition of n factorial is: In ruby, this can be written as: You may notice the repeated occurrence of end. Ruby has been called “Algol-like” because of this. (Actually, the syntax of ruby more closely mimics that of a langage named Eiffel.) You may also notice the lack…

First, you’ll want to check whether ruby is installed. From the shell prompt (denoted here by “%“, so don’t type the %), type (-v tells the interpreter to print the version of ruby), then press the Enter key. If ruby is installed, you will see a message something like the following: If ruby is not…

Ruby is “an interpreted scripting language for quick and easy object-oriented programming”; what does this mean? interpreted scripting language: ability to make operating system calls directly powerful string operations and regular expressions immediate feedback during development quick and easy: variable declarations are unnecessary variables are not typed syntax is simple and consistent memory management is…