|Overview: Hello World|
A program that outputs the text "Hello world."
Sanity testing of environments, equipment, output and communication.
Sanity TestingArtificial Intelligence
What is Hello World?
John Spacey, updated on July 05, 2023
Hello world is a computer program that does nothing but print the words "Hello world." Programmers commonly use such programs as a basic sanity test that output or communication is working. In some cases, hello world is used to test other things. For example, a hello world in multiple languages can be used to test localization. The practice of using hello world as a basic test extends back as far as 1974. This tends to occur naturally to programmers who may not be familiar with the practice. Given the need to say something in a test, hello world seems appropriate. Many programmers have a special fondness for hello world as it is often the first program that they wrote as a student.
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