A programming language is a notation for writing programs, which are specifications of a computation or algorithm.Some, but not all, authors restrict the term "programming language" to those languages that can express all possible algorithms.
Programming always fascinates people. Programming is the core of all programs and "Hello World" is the first sentence we usually write when it comes to a new encoding language.
"Hello World" is very common, since it is a simple code in almost all programming languages. As such, it can be used to quickly compare the syntax differences between the various programming languages. It is also used to verify that a language or system is working correctly. The following list of "Hello World" is programmed in 28 of the most used programming languages.
A programming language is a formal computer language designed to communicate instructions to a machine, particularly a computer. Programming languages can be used to create programs to control the behavior of a machine or to express algorithms.
The earliest known programmable machine preceded the invention of the digital computer and is the automatic flute player described in the 9th century by the brothers Musa in Baghdad, "during the Islamic Golden Age". From the early 1800s, "programs" were used to direct the behavior of machines such as Jacquard looms and player pianos. Thousands of different programming languages have been created, mainly in the computer field, and many more still are being created every year. Many programming languages require computation to be specified in an imperative form (i.e., as a sequence of operations to perform) while other languages use other forms of program specification such as the declarative form (i.e. the desired result is specified, not how to achieve it).
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