HP 33s - Manual (Page 165)

Simple Programming 12–7
Function Names in Programs
The name of a function that is used in a program line is not necessarily the same as
the function's name on its key, in its menu, or in an equation. The name that is used
in a program is usually a fuller abbreviation than that which can fit on a key or in
a menu. This fuller name appears briefly in the display whenever you execute a
function — as long as you hold down the key, the name is displayed.
Example: Entering a Labeled Program.
The following keystrokes delete the previous program for the area of a circle and
enter a new one that includes a label and a return instruction. If you make a
mistake during entry, press
b to delete the current program line, then reenter the
line correctly.
Keys:
(In RPN mode)
Display: Description:
{ e
 Activates Program–entry
mode (PRGM on).
{ c { }
{&}

 !  Clears all of program
memory.
{ • A 
   Labels this program
routine A (for "area").
!
| N
z

 º




π

 º
Enters the three program
lines.
| –

 ! Ends the program.
{ Y { }  
/ Displays label A and the
length of the program in
bytes.
| 
/
/ Checksum and length of
program.
‡ ‡ Cancels program entry
(PRGM annunciator off).
A different checksum means the program was not entered exactly as given here.