One-Number Functions; General Functions - HP -15C Owner's Handbook Manual

Keystrokes
123.4567 |'
|K " |'
|K ´q
1.23456789 "
|&
´ CLEAR u
(release)
|a

One-Number Functions

One-number math functions in the HP-15C operate only upon the number in
the display (X-register).

General Functions

Reciprocal. Pressing ∕ calculates the reciprocal of the number in the
display.
Factorial and Gamma. Pressing ´ ! calculates the factorial of the
displayed value, where x is an integer 0≤x≤69.
You can also use ! to calculate the Gamma function, Γ(x), used in
advanced mathematics and statistics. Pressing ´ ! calculates Γ(x + 1),
so you must subtract 1 from your initial operand to get Γ(x). For the Gamma
function, x is not restricted to nonnegative integers.
Square Root. Pressing ¤ calculates the positive square root of the
number in the display.
Squaring. Pressing | x calculates the square of the number in the
display.
Keystrokes
25 ∕
8 ´ !
3.9 ¤
12.3 | x
Section 2: Numeric Functions
Display
123.0000
-123.0000
-0.4567
-1.2346
1234600000 Temporarily displays all
-1.2346
1.2346
Display
0.0400
40,320.0000
1.9748
151.2900
Reversing the sign does
not alter digits.
digits in the mantissa.
Calculates 8! or Γ(9).
25