Eiffel

Eiffel is an actively used programming language created in 1986. Eiffel is an object-oriented programming language designed by Bertrand Meyer (an object-orientation proponent and author of Object-Oriented Software Construction) and Eiffel Software. Meyer conceived the language in 1985 with the goal of increasing the reliability of commercial software development; the first version becoming available in 1986. In 2005, Eiffel became an ISO-standardized language. Read more on Wikipedia...

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• Eiffel ranks in the top 5% of languages
• the Eiffel website
• the Eiffel wikipedia page
• Eiffel first appeared in 1986
• Eiffel was created by Bertrand Meyer
• file extensions for Eiffel include e
• the Eiffel team is on twitter
• See also: freebsd, linux, solaris, ada, simula, z-notation, csharp, d, java, lisaac, racket, ruby, sather, scala, algol, pascal, visual-studio-editor, isbn, smalltalk, c, cil, java-bytecode
• Have a question about Eiffel not answered here? Email me and let me know how I can help.

Example code from the Hello World Collection:

note "Hello World in Eiffel"
class HELLO
create run
feature run
       do
               print ("Hello World!%N")
       end
end

Example code from Linguist:

note
	description: "Git checkout command."
	author: "Olivier Ligot"

class
	GIT_CHECKOUT_COMMAND

inherit
	GIT_COMMAND

create
	make,
	make_master

feature {NONE} -- Initialization

	make (a_branch: STRING)
			-- Checkout the branch `a_branch'.
		do
			initialize
			arguments.force_last (a_branch)
			branch := a_branch
		ensure
			branch_set: branch = a_branch
		end

	make_master
			-- Checkout the master branch.
		do
			make ("master")
		end

feature -- Access

	branch: STRING
			-- Branch to checkout

	name: STRING = "checkout"
			-- Git subcommand name

end

Example code from Wikipedia:

class
    HELLO_WORLD
create
    make
feature
   make
      do
         print ("Hello, world!")
      end
end

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Last updated February 18th, 2020

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