HP 20b Calculator Quick Start Guide

Mathematical Calculations
27
Table 2-3 Shifted Function Mathematical Operations
Keys Description
:f
Executes the Random function. Returns a random
number in the range 0 < x <1.
:g
Calculates factorial of x (where 0 ≤ x ≤ 253).
:h
y
x
. Returns y to the x power.
:i
Reciprocal.
:e
Rounds x internally to the number specified by the
display format. Default is two digits to the right of the
decimal point.
The Math :s Menu
There are additional one-number functions available in the Math menu. To open
the Math menu, press :s. See Figure 2-2 for the menu map of the Math
menu.