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Tuesday, 25 June 2013
PROGRAMMING LANGUAGES
1) A programming language is an artificial language designed to communicate instructions to a machine, particularly a computer. 2) Programming languages can be used to create programs that control the behavior of a machine and/or to express algorithms precisely. 3) They are distinguished from natural languages by the fact that they define an artificial world that is simple enough to define precisely. 4) In general, this enables a human to perform the actions indicated by the symbols of a program in their mind and arrive at the same resulting world-state as any other human, or machine, that performs the same actions. 5) For well defined programming languages , the correct resulting world-state of an individual action can be proven formally. 6) The earliest programming languages predate the invention of the computer, and were used to direct the behavior of machines such as Jacquard looms and player pianos.
7) Thousands of different programming languages have been created, mainly in the computer field, with many being created every year. 8) Most programming languages describe computation in an imperative style, i.e., as a sequence of commands, although some languages, such as those that support functional programming or logic programming, use alternative forms of description. 9) The description of a programming language is usually split into the two components of syntax (form) and semantics (meaning). 10) Some languages are defined by a specification document (for example, the C programming language is specified by an ISO Standard), while other languages, such as Perl 5 and earlier, have a dominant implementation that is used as a reference.
1) A programming language is an artificial language designed to communicate instructions to a machine, particularly a computer. 2) Programming languages can be used to create programs that control the behavior of a machine and/or to express algorithms precisely. 3) They are distinguished from natural languages by the fact that they define an artificial world that is simple enough to define precisely. 4) In general, this enables a human to perform the actions indicated by the symbols of a program in their mind and arrive at the same resulting world-state as any other human, or machine, that performs the same actions. 5) For well defined programming languages , the correct resulting world-state of an individual action can be proven formally. 6) The earliest programming languages predate the invention of the computer, and were used to direct the behavior of machines such as Jacquard looms and player pianos.
7) Thousands of different programming languages have been created, mainly in the computer field, with many being created every year. 8) Most programming languages describe computation in an imperative style, i.e., as a sequence of commands, although some languages, such as those that support functional programming or logic programming, use alternative forms of description. 9) The description of a programming language is usually split into the two components of syntax (form) and semantics (meaning). 10) Some languages are defined by a specification document (for example, the C programming language is specified by an ISO Standard), while other languages, such as Perl 5 and earlier, have a dominant implementation that is used as a reference.
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