Interactive Ruby Shell

Interactive Ruby Shell (IRB) is a shell for programming in the object-oriented scripting language Ruby. IRB is run from the command line and allows the programmer to experiment with code in real time. It allows you to enter Ruby commands at the prompt and have the interpreter respond immediately. It features command history, line editing capabilities, and job control, and is able to communicate directly as a shell script over the Internet and interact with a live server. It was developed by Keiju Ishitsuka.
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