Texas Instruments TI-82 STATS Manual Book page 309

While
Repeat
performs a group of commands while condition is true.
While
condition is frequently a relational test (Chapter 2). condition is
tested when
While
the program executes a group of commands.
end of the group. When condition is false (zero), the program
executes each command following
be nested.
condition
:While
command (while condition is true)
:
command (while condition is true)
:
:End
command
:
Program
repeats a group of commands until condition is true
Repeat
(nonzero). It is similar to
is encountered; therefore, the group of commands is always
End
executed at least once.
condition
:Repeat
command (until condition is true)
:
command (until condition is true)
:
:End
command
:
Program
is encountered. If condition is true (nonzero),
End
Output
, but condition is tested when
While
instructions can be nested.
Repeat
Output
signifies the
End
. instructions can
While
Programming 16–11