Runtime Environments

The runtime environment is an important concept. The concept of “environment” itself will be introduced later, but it’s not the same thing. The runtime environment is where and “by whom” our programs will be launched in Ruby. Let’s say a qualified chemist conducts an experiment in a test tube, a big glass jar, and even their own bath. It can be used by any “interpreter” (a program-launching program) in Windows, Mac, and Linux.