Interactive Ruby Shell: Difference between revisions

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#REDIRECT [[Category:Ruby (programming language)#Features]]

'''Interactive Ruby Shell''' ('''IRB''') is a [[shell (computing)|shell]] for programming in the [[Object-oriented programming|object-oriented]] [[scripting language]] [[Ruby programming language|Ruby]]. IRB is run from the [[Command line interface|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]].

{{Rcat shell|

Program usage:

{{R to related topic}}

irb [ options ] [ ''programfile'' ] [ ''argument...'' ]

{{r hist}}

}}

Example usage:

irb(main):001:0> n = 5

=> 5

irb(main):002:0> def fact(n)

irb(main):003:1> if n <= 1

irb(main):004:2> 1

irb(main):005:2> else

irb(main):006:2* n * fact(n - 1)

irb(main):007:2> end

irb(main):008:1> end

=> nil

irb(main):009:0> fact(n)

=> 120

==See also==

* [[Comparison of computer shells]]

==External links==

*[http://www.rubycentral.com/pickaxe/trouble.html "When Trouble Strikes"] chapter from ''[[Programming Ruby]]''

*[http://www.rubycentral.com/pickaxe/irb.html "Interactive Ruby Shell"] chapter from ''[[Programming Ruby]]''

*[http://tryruby.hobix.com/ Try Ruby!]&mdash;An interactive tutorial and Ruby shell within your browser.

{{Compu-lang-stub}}

[[Category:Scripting languages]]

[[Category:Ruby programming language]]

[[fr:Interactive Ruby]]