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Eiffel is an ISO-standardized, object-oriented programming language designed to enable programmers...

Eiffel is an ISO-standardized, object-oriented programming language designed to enable programmers to efficiently develop extensible, reusable, reliable software. Eiffel is used in academia as a language for teaching computer-programming principles. Eiffel is used in the finance, aerospace, health-care, video-gaming, and other industries as a development platform. Since 1985, many suppliers have developed Eiffel programming environments. The design of the language is closely connected with the Eiffel programming method. Both are based on a set of principles, including design by contract, command-query separation, uniform-access principle, single-choice principle, open-closed principle, and option-operand separation. Many concepts initially introduced by Eiffel later found their way into Java, C#, and other languages. New language-design ideas, particularly through the Ecma/ISO standardization process, continue to be incorporated into the Eiffel language. The key characteristics of the Eiffel language include: Eiffel emphasizes declarative statements over procedural code and attempts to eliminate the need for bookkeeping instructions. Eiffel shuns coding tricks or coding techniques