Yes, these are the first words that every novice programmer prints! And I did not change this old and good tradition and do exactly the same as thousands of programmers did before me. A kind of challenge to the entire digital world, a statement about yourself for all to hear!

«Hello, world!»

A “Hello, World!” program is generally a computer program that ignores any input and outputs or displays a message similar to “Hello, World!”. A small piece of code in most general-purpose programming languages, this program is used to illustrate a language’s basic syntax. “Hello, World!” programs are often the first a student learns to write in a given language, and they can also be used as a sanity check to ensure computer software intended to compile or run source code is correctly installed, and that its operator understands how to use it.

While small test programs have existed since the development of programmable computers, the tradition of using the phrase “Hello, World!” as a test message was influenced by an example program in the 1978 book The C Programming Language, but there is no evidence that it originated there, and it is very likely it was used in BCPL beforehand (as below). The example program in that book prints “hello, world”, and was inherited from a 1974 Bell Laboratories internal memorandum by Brian Kernighan

“Hello, World!” programs vary in complexity between different languages. In some languages, particularly scripting languages, the “Hello, World!” program can be written as a single statement, while in others (particularly many low-level languages) there can be many more statements required. For example, in Python, to print the string Hello, World! followed by a newline, one only needs to write print(“Hello, World!”). In contrast, the equivalent code in C++ requires the import of the input/output software library, the manual declaration of an entry point, and the explicit instruction that the output string should be sent to the standard output stream. Generally, programming languages that give the programmer more control over the machine will result in more complex “Hello, World!” programs.

The phrase “Hello, World!” has seen various deviations in casing and punctuation, such as the capitalization of the leading H and W, and the presence of the comma and/or exclamation mark. Some devices limit the format to specific variations, such as all-capitalized versions on systems that support only capital letters, while some esoteric programming languages may have to print a slightly modified string. For example, the first non-trivial Malbolge program printed “Hello world”, this having been determined to be good enough. Other human languages have been used as the output; for example, a tutorial for the Go programming language outputted both English and Chinese or Japanese characters, demonstrating the programming language’s built-in Unicode support.

A “Hello, World!” message being displayed through long-exposure light painting with a moving strip of LEDs Some languages change the functionality of the “Hello, World!” program while maintaining the spirit of demonstrating a simple example. Functional programming languages, such as Lisp, ML, and Haskell, tend to substitute a factorial program for “Hello, World!”, as functional programming emphasizes recursive techniques, whereas the original examples emphasize I/O, which violates the spirit of pure functional programming by producing side effects. Languages otherwise capable of printing “Hello, World!” (Assembly, C, VHDL) may also be used in embedded systems, where text output is either difficult (requiring additional components or communication with another computer) or nonexistent. For devices such as microcontrollers, field-programmable gate arrays, and CPLDs, “Hello, World!” may thus be substituted with a blinking LED, which demonstrates timing and interaction between compo

The Debian and Ubuntu Linux distributions provide the “Hello, World!” program through their software package manager systems, which can be invoked with the command hello. It serves as a sanity check and a simple example of installing a software package. For developers, it provides an example of creating a .deb package, either traditionally or using debhelper, and the version of hello used, GNU Hello, serves as an example of writing a GNU program.

Variations of the “Hello, World!” program that produce a graphical output (as opposed to text output) have also been shown. Sun demonstrated a “Hello, World!” program in Java based on scalable vector graphics, and the XL programming language features a spinning Earth “Hello, World!” using 3D computer graphics. Mark Guzdial and Elliot Soloway have suggested that the “hello, world” test message may be outdated now that graphics and sound can be manipulated as easily as text.

The easiest way to make your first post is to edit this one. Go into /_posts/ and update the Hello World markdown file. For more instructions head over to the Когортный анализ on GitHub.