Hello world and hello Texas from Database

Install with something like Astronaut. Get to a GT.M prompt. Item 3 if you are using VistA Commander.

MUMPS>write "hello world"

hello world

MUMPS>write "hello " write $P(^DIC(5,48,0),"^",1)

hello TEXAS

What the above hello TEXAS line does:

• Invoke the $piece command which is similar too but not exactly like the substring command in many other languages.
• The ^ indicates that this is not a local variable, that it is looking for data on disk that others can see.
• DIC indicates look in the data dictionary in file 5, field 48, item 0 with the ^ in this case being a delimiter and return only 1 token.