HP 40gs - Manual (Page 31)

Getting started 1-19
To change views Each view is a separate environment. To change a view,
select a different view by pressing
, ,
keys or select a view from the VIEWS menu. To change
to HOME, press
. You do not explicitly close the
current view, you just enter another one—like passing
from one room into another in a house. Data that you
enter is automatically saved as you enter it.
To save aplet
configuration You can save an aplet configuration that you have used,
and transfer the aplet to other HP 40gs calculators. See
“Creating new aplets based on existing aplets” on
page 22-1.
Mathematical calculations
The most commonly used math operations are available
from the keyboard. Access to other math functions is via
the MATH menu (
). You can also CAS for symbolic
calculations. See “Computer Algebra System (CAS)” on
page 14-1 for further information.
To access programming commands, press CMDS .
See “Programming commands” on page 21-13 for
further information.
Where to start
The home base for the calculator is the HOME view
(
). You can do all non-symbolic calculations here,
and you can access all operations. (Symbolic
calculations are done using CAS.)
Entering
expressions • In the HOME view, you enter an expression in the
same left-to-right order that you would write the
expression. This is called algebraic entry. (In CAS
you enter expressions using the Equation Writer,
explained in detail in Chapter 15, “Equation
Writer”.)
• To enter functions, select the key or MATH menu item
for that function. You can also enter a function by
using the Alpha keys to spell out its name.
• Press to evaluate the expression you have in
the edit line (where the blinking cursor is). An
expression can contain numbers, functions, and
variables.
hp40g+.book Page 19 Friday, December 9, 2005 1:03 AM