The "Clear" Keys - HP -15C Owner's Handbook Manual

20 Section 1: Getting Started
Keystrokes
6.6262
‛
3
4
"
v
50 *
Note: Decimal digits from the mantissa that spill into the exponent
field will disappear from the display when you press ―, but will be
retained internally.
To prevent a misleading display pattern, ‛ will not operate with a
number having more than seven digits to the left of the radix mark (decimal
point), nor with a mantissa smaller than 0.000001. To key in such a number,
use a form having a greater exponent value (whether positive or negative).
For example, 123456789.8×10
0.00000025×10

The "CLEAR" Keys

Clearing means to replace a number with zero. The clearing operations in
the HP-15C are (the table is continued on the next page):
Clearing Sequence
|`
−
In Run mode:
In Program mode:
´ CLEAR ∑
Display
6.6262
6.6262
6.6262
6.6262
6.6262
6.6262
3.3131
-15
can be keyed in as 2.5×10
00
The 00 prompts you to
key in the exponent.
03
(6.6262×10
34
(6.6262×10
-34
(6.6262×10
-34
Enters number.
-32
Joule-seconds.
23
can be keyed in as 1234567.898×10
-22
.
Clears display (X-register).
Clears last digit or entire display.
Deletes current instruction.
Clears statistics storage registers, display,
and the memory stack (described in
section 3).
3
).
34
).
-34
).
Effect
25
;