Computer program that produces the message "Hello, world!", often used to illustrate the basic syntax of a programming language
Also known as Hello, world · Hello, world! · "Hello, world!" program · hello world program · "Hello world!" program
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A "Hello, world" program is usually a simple computer program that outputs a message similar to "Hello, world". The text may be printed out or displayed on a screen. A small piece of code in most general-purpose programming languages, this program is used to illustrate a language's basic syntax. Such a program is often the first written by a student of a new programming language, but it can also be used as a sanity check to ensure that the computer software intended to compile or run source code is correctly installed, and that its operator understands how to use it.