These programs, prog1.chpl through prog4.chpl, are part of the chplvis
primer.  It is best to read that primer instead of reading these file.
Use these files to try out chplvis while reading the primer.

If these programs are modified, the corresponding chplvis.rst file
must be updated to match.  chplvis.rst is located in
chapel/doc/sphinx/source/tools/chplvis.
