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IRB(1)			Ruby Programmer's Reference Guide		  IRB(1)

NAME
     irb -- Interactive Ruby Shell

SYNOPSIS
     irb [--version] [-dfUw] [-I directory] [-r library]
	 [-E external[:internal]] [-W[level]] [--[no]inspect] [--[no]multiline]
	 [--[no]singleline] [--[no]echo] [--[no]colorize] [--[no]autocomplete]
	 [--[no]verbose] [--prompt mode] [--prompt-mode mode] [--inf-ruby-mode]
	 [--simple-prompt] [--noprompt] [--tracer] [--back-trace-limit n] [--]
	 [program_file] [argument ...]

DESCRIPTION
     irb is the REPL(read-eval-print loop) environment for Ruby programs.

OPTIONS
     --version

     --E-eenxctoedrinnaglexitnetrenranla[l:internal]

     -I path

     -U

     -d

     -f

     -w

     -W

     --h-help

     -r library

     --inspect

     --noinspect

     --multiline

     --nomultiline

     --singleline

     --nosingleline

     --extra-doc-dir

     --echo

     --noecho

     --echo-on-assignment

     --noecho-on-assignment

     --truncate-echo-on-assignment

     --colorize

     --nocolorize

     --autocomplete

     --noautocomplete

     --regexp-completor

     --type-completor

     --verbose

     --noverbose

     ----pprroommpptt-mmooddee mode

     --inf-ruby-mode

     --simple-prompt

     --noprompt

     --tracer

     --back-trace-limit n

ENVIRONMENT
     IRB_LANG		   The locale used for irb.

     IRBRC		   The path to the personal initialization file.

     XDG_CONFIG_HOME	   irb	respects XDG_CONFIG_HOME. If it is set and IRBRC
			   is unset, load $XDG_CONFIG_HOME/irb/irbrc as  a  per-
			   sonal initialization file.

     RI_PAGER		   The command specified would be used as a pager.

     PAGER		   The	command  specified  would  be used as a pager if
			   RI_PAGER is unset.

     VISUAL		   Its value would be used to open  files  by  the  edit
			   command.

     EDITOR		   Its	value  would  be  used to open files by the edit
			   command if VISUAL is unset.

     NO_COLOR		   Assigning a value to it disables colorization.

     IRB_USE_AUTOCOMPLETE  Assigning false to it disables autocompletion.

     IRB_COMPLETOR	   Autocompletion behavior. Allowed values are regexp or
			   type

     IRB_COPY_COMMAND	   Overrides the default program used to interface  with
			   the system clipboard.

     Also irb depends on same variables as ruby(1).

FILES
     ~/.irbrc
	     Personal  irb initialization. If IRBRC is set, read $IRBRC instead.
	     If   IRBRC   is   not   set    and    XDG_CONFIG_HOME    is    set,
	     $XDG_CONFIG_HOME/irb/irbrc is loaded.

EXAMPLES
	   % irb
	   irb(main):001:0> 1 + 1
	   2
	   irb(main):002:0> def t(x)
	   irb(main):003:1> x + 1
	   irb(main):004:1> end
	   => :t
	   irb(main):005:0> t(3)
	   => 4
	   irb(main):006:0> if t(3) == 4
	   irb(main):007:1> p :ok
	   irb(main):008:1> end
	   :ok
	   => :ok
	   irb(main):009:0> quit
	   %

SEE ALSO
     ruby(1).

REPORTING BUGS
     *	 Security  vulnerabilities  should  be	reported  via  an email to secu-
	 rity@ruby-lang.org.  Reported problems will be  published  after  being
	 fixed.

     *	 Other	bugs  and  feature  requests  can be reported via the Ruby Issue
	 Tracking System (https://bugs.ruby-lang.org/).  Do not report	security
	 vulnerabilities  via  this system because it publishes the vulnerabili-
	 ties immediately.

AUTHORS
     Written by Keiju ISHITSUKA.

UNIX				 August 11, 2019			  IRB(1)

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