Hello World is one of the simplest program in most computer languages. It is often considered to be tradition among programmers for people attempting to learn a new programming language to write a 'Hello World!' program as one of the first steps of learning that particular language.
A hello world program has become the traditional first program that many people learn. In general, it is simple enough that people who have no previous experience with computer programming can easily understand it, especially with the guidance of a teacher or a written guide. Using this simple program as a basis, computer science principles or elements of a specific programming language can be explained to novice programmers. Experienced programmers learning new languages can also gain a lot of information about a given language's syntax and structure from a hello world program.