Now we can start the program using YaST. For this, we will use a script /sbin/yast2. It is an envelope for easier setup of a running YaST environment.

So if you are reading this document with a browser, you could copy-and-paste the program listed above into a file hello.ycp, and then run /sbin/yast2 hello.ycp which should render the following “spectacular” result.

Figure 1.1. Output of the “Hello, World!”-program

Starting off with this simple example we will now explore the more subtle details of YCP. Since all programming is about handling of data there must be a way to hold it in variables of different types. In the next section you will get to know the various data types that YCP knows about.