Page 2-36
GNAME means a
global name
, and
REAL
means a real (or floating-point)
numeric variable.
•
The fourth and last column represents the size, in bytes, of the variable
truncated, without decimals (i.e., nibbles). Thus, for example, variable
PERIOD takes 12.5 bytes, while variable REALASSUME takes 27.5 bytes
(1 byte = 8 bits, 1 bit is the smallest unit of memory in computers and
calculators).
CASDIR Variables in the stack
Pressing the
$
key closes the previous screen and returns us to normal
calculator display. By default, we get back the TOOL menu:
We can see the variables contained in the current directory, CASDIR, by
pressing the
J
key (first key in the second row from the top of the
keyboard). This produces the following screen:
Pressing the
L
key shows one more variable stored in this directory:
•
To see the contents of the variable EPS, for example, use
‚
@EPS@
. This
shows the value of EPS to be
.0000000001
•
To see the value of a numerical variable, we need to press only the soft
menu key for the variable. For example, pressing
cz
followed by
`
,
shows the same value of the variable in the stack, if the calculator is set to
Algebraic
. If the calculator is set to
RPN
mode, you need only press the
soft menu key for
`
.
•
To see the full name of a variable, press the apostrophe first
³
, and
then the soft menu key corresponding to the variable. For example, for
the variable listed in the stack as PERIO, we use:
³
@PERIO@
, which
produces as output the string:
'PERIOD'
.
This procedure applies to
both the
Algebraic
and
RPN
calculator operating modes.
Variables in CASDIR
The default variables contained in the CASDIR directory are the following:
PRIMIT
Latest primitive (anti-derivative) calculated, not a default
