Hello world!
A “Hello, World!” program is generally a simple computer program that emits (or displays) to the screen (often the console) 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. A “Hello, World!” program is often the first written by a student of a new programming language,[1]but such a program can also be used as a sanity check to ensure that the computer software intended to compile or run source codeis correctly installed, and that its operator understands how to use it.
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