HP HP-15C - The CLEAR Keys

20 Section 1: Getting Started
Keystrokes
Display
6.6262
6.6262
‛
6.6262 00
The 00 prompts you to
key in the exponent.
3
6.6262 03
(6.6262×10
3
).
4
6.6262 34
(6.6262×10
34
).
“
6.6262 -34
(6.6262×10
-34
).
v
6.6262 -34
Enters number.
50 *
3.3131 -32
Joule-seconds.
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
23
can be keyed in as 1234567.898×10
25
;
0.00000025×10
-15
can be keyed in as 2.5×10
-22
.
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
Effect
|`
Clears display (X-register).
−
In Run mode:
Clears last digit or entire display.
In Program mode:
Deletes current instruction.
´ CLEAR ∑
Clears statistics storage registers, display,
and the memory stack (described in
section 3).