HP 38g Graphing Calculator - Manual (Page 164)

CASE-END Executes a series of test-ciause commands that execute the
appropriate tm e -c la u s e sequence of commands. Its syntax is;
CASE
IF te s t-c la u s e ^ THEN tr u e -c la u s e ^END
IF te s t-c la u s e ^ THEN tr u e -c la u s e ^ END
IF te s t-c la u s e ^ THEN tr u e -c la u s e ^ END
END
When CASE is executed, te s U la u s e ^ is evaluated. If the test is true,
tm e -c la u s e ^ is executed, and execution skips to END. If te s K la u s e ,
if false, execution proceeds to te s t-c la u s e ^ . Execution with the
CASE structure continues until a true-clause is executed (or until
all the test-clauses evaluate to false).
IFERR-
THEN...
EL5E...
Many conditions are automatically recognized by the HP 38G as
e r r o r c o n d itio n s —and they’re automatically treated as errors in
programs.
IFERR...THEN...ELSE allows a program to intercept error
conditions that otherwise would cause the program to abort. Its
syntax is:
IFERR tr a p -c la u s e
THEN e r r o r -c la u s e ELSE n o r m a l-c la u s e END
RUN Runs the named program. If your program name contains
special characters, such as a space, and then you must enclose
the file name in double quotes (“ ")■
RUN " p r o g r a m n a m e " or RUN p r o g r a m n a m e
STOP Stops the current program.
STOP
8-12 Programming