Negative Numbers; Display Clearing: [Clx]And - HP -11C Owner's Handbook Manual

Section 1: Getting Started 17
Negative Numbers
To make a displayed number negative—either one that has just
been keyed in or one that has resulted from a calculation— simply
press (change sign). When the display shows a negative
number—that is, the number is preceded by a minus sign—
pressing removes the minus sign from the display, making
the number positive.
Display Clearing: [CLx]and
The HP-11C has two types of display clearing operations,
(clear X) and («](back arrow). When pressed in Run mode, [9][CLx]
clears any displayed numbers to zero. When pressed in Program
mode, [9][CLx]is stored in the calculator as a program instruction.
(«] is a nonprogrammable function that enables you to clear the
display in either Program or Run mode, as follows:
1. In Run mode:
A. Pressing after executing almost any function clears
all digits in the display to zero.* (Executing almost any
HP-11C function terminates digit entry—thatis, tells
the calculator the number in the display is complete—
and causes [«]to act on the complete number.)
Keystrokes Display
12345 12,345
111.1081
(«] 0.0000 Pressing [«]after
executing a function
clears all digits in the
display to zero.
* Unseen trailing digits of the number in the display may be held internally and will also
be cleared.