Hello world! This is a computer program that outputs or displays to the user as first as this article in wordpress CMS. Not also programmer, hackers as a proof of concept that arbitrary code can be executed through an exploit where the system designers did not intend code to be executed.
The first computer programm early used the phrase “Hello world!” as a test message was influenced by an example program in the seminal book The C Programming Language. The example program from that book prints “hello, world”