In order to work with any variable type, you first need to know how to create one. Unlike many other programming languages, Ruby does not require that you declare variables: indicate that a variable of a specific type exists. Instead, a variable in Ruby is often first referenced when it’s assigned a value. Doing so makes use of the assignment operator, which is a single equals sign. The basic syntax is
identifier = value
A variable’s identifier, which is to say its name, consists of letters, numbers, and underscores. Variable names cannot start with a number, and, most importantly, they are case sensitive. Variable names should not begin with a capital letter, as that naming scheme is reserved for constants (covered later in ...