What is Hello, World in code?

A “Hello, world!” program is traditionally used to introduce novice programmers to a programming language . “Hello, world!” is also traditionally used in a sanity test to make sure that a computer language is correctly installed, and that the operator understands how to use it.

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What is Hello, World in Java?

In Java, every application begins with a class definition. In the program, HelloWorld is the name of the class , and the class definition is: class HelloWorld { … .. … } For now, just remember that every Java application has a class definition, and the name of the class should match the filename in Java.

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