HP 48G - The Command Line and the Stack

THE CommAND LINE AND THE STACK
Entering Objects onto the Stack
To perform arithmetic and other operations on an ob-
ject (of most any type), you must put the object onto
the stack. To accomplish this, you first build it on the
command line, then press [ENTER), which puts it onto
the stack atthe bottom (level 1) pushing all other stack
objects up a level, and clearing the command line for
the next building session.
If you err while typing on the command line, use («4)or
(»]to move to the offending character(s), then or
(«)to erase them. Or abort the whole thing via (CANCEL)
((©oN)). Or, use the menu and its various other
cursor movement tools and editing options:
(28)"
£5KIP[SKIP 3 £DEL |DEL* INS +2TK
skips the cursor to the farright; deletes
everything to the right; likewise to the left for
and EJTIM. If you toggle the key off (so that
the white square disappears from the menu item), the
cursor becomes square and will type over characters
rather than inserting between them.
Delimiters
Bearin mind that you can actually build more than one
complete object on the command line prior to press-
ing (ENTER). To separate successive objects, put a de-
limiter character between them. For example, by typ-
ing (1JsPC)(2]sPC](3]sPC)(4ISPC] (5] (ENTER), you would
be entering five objects onto the stack at once; each
would go on in the order you typed it. The most com-
mon “all-purpose” delimiter characters are the comma
and the space (as used here), but the syntaxes of
many specific object types (see page 1) include other
distinctive beginning/ending characters thatcan serve
as delimiters, too.
The Shift Keys
When typing on the command line, you'll soon dis-
cover that there are far more commands and charac-
ters available for entering objects than there are act-
*Menu numbers, such as this 28, are discussed on page 10.
2 THe HP 48G/GX Pocket GuIDE