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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 pro
g
ram
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.