(tu00.txt)
All file-names starting with tu refer to tutorials. 
Their extension is .sc for the verbs running the tutorials and
for the text files, the extension is .txt 

tu0 is the first (or do we call that the zero"ist?) of several.
You might know that in J all counting starts at zero. It takes some
getting used to. However it is really not a big deal. 
You start a tutorial by typing tu(n) '' That is 2 quotes next to each other. 
I repeated that info here in case someone else started this tutorial for you.

The level of knowledge of a reader of these tutorials is assumed to be 
beginner. I made the documentation in the verbs extensive, maybe made the
documentation too detailed. However I found that this style of documentation
saved me more time while debugging, off setting the extra time spent on 
documentation. I hope that you will not copy bad coding habits, keep in
mind that the code looks too much like A.P.L. code but I have to climb
the learning curve also. Also it is not easy to shake off over 20 years of 
A.P.L. experience.

