Portal:Computer Programming

Computer programming

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Computer programming (often shortened to programming or coding) is the process of designing, writing, testing, debugging, and maintaining the source code of computer programs. This source code is written in one or more programming languages. The purpose of programming is to create a set of instructions that computers use to perform specific operations or to exhibit desired behaviors. The process of writing source code often requires expertise in many different subjects, including knowledge of the application domain, specialized algorithms and formal logic.

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A punched card, punch card, IBM card, or Hollerith card is a piece of stiff paper that contains digital information represented by the presence or absence of holes in predefined positions. Now an obsolete recording medium, punched cards were widely used throughout the 19th century for controlling textile looms and in the late 19th and early 20th century for operating fairground organs and related instruments. They were used through the 20th century in unit record machines for input, processing, and data storage. Early digital computers used punched cards, often prepared using keypunch machines, as the primary medium for input of both computer programs and data. Some voting machines use punched cards.

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Paul Gardner Allen (born January 21, 1953) is an American business magnate, investor, and philanthropist. Allen co-founded Microsoft with Bill Gates. He is also the 57th richest man in the world along with Viktor Vekselberg and Gerald Cavendish Grosvenor (and family) who all rank the same with an estimated wealth of $13 billion as of 2011. He is the founder and chairman of Vulcan Inc., which manages his business and philanthropic efforts. Allen also has a multi-billion dollar investment portfolio which includes technology companies such as Evri and Gist, real estate holdings, and stakes in other technology, media, and content companies. Allen also owns two professional sports teams, the Seattle Seahawks of the National Football League (NFL), and the Portland Trail Blazers of the National Basketball Association (NBA). He is also part-owner of the Seattle Sounders FC, which joined Major League Soccer (MLS) in 2009. Allen's memoir Idea Man: A Memoir by the Cofounder of Microsoft was released on April 19, 2011.

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The Hello world program (shown here in C++) is one of the simplest programs to create, often used to illustrate the basic syntax of a programming language and its development cycle.

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