HP 33s - Manual (Page 209)

Programming Techniques 13–25
Program Lines:
(In RPN mode)
Description:

   Begins the program.

  
Sets equations for execution.

   Disables equation prompting.

 )
 Sets counter for 1 to 26.

 ! L Stores counter.

Initializes sum.
Checksum and length: AEC5 42

   Starts summation loop.

 1 1L2 2: Equation to evaluate the ith square.
(Press
| H to start the equation.)
Ckecksum and length of equation: F09C 5

 - Adds ith square to sum.

   L Tests for end of loop.

 !  Branches for next variable.

! Ends program.
Checksum and length of program: E005 23