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20090601
1-6-10
Input
Tip
• As its name suggests, a single-character variable is a variable name that consists of a single
character like “
a
” or “
x
”. Each character you input on the
5
keyboard is treated as a single-
character variable. To input multiple-character variable names like “ab” or multiple-character
strings, you must use the alphabet (abc) keyboard. For more information, see “Using Single-
character Variables” on page 1-6-12.
• For information about the
#
key that appears in the lower right of all of the math (mth) keyboard
key sets, see “Using the Answer Variable (ans)” on page 2-2-2.
I
Using the Alphabet (abc) Keyboard
In addition of the initial alphabet (abc) key set, you can also select from among three
other key sets, within alphabet (abc), named
,
(character symbols),
L
(mathematics
symbols), and
2
(extra symbols).
S
Initial alphabet (abc) keyboard key set
This keyboard is for inputting lower-case alphabetic characters. Tap
+
to shift the keyboard
or
$
to caps lock the keyboard when you want to input upper-case characters.
• Note that the initial alphabet (abc) keyboard uses the qwerty key arrangement, which is
similar to a computer keyboard. You can also change to an azerty or qwertz arrangement.
See “16-9 Specifying the Alphabetic Keyboard Arrangement”.
S
5
key set
Tapping the
5
key displays keys for inputting single-character variables, and changes
the
5
softkey to
(
. You can tap this key to toggle between
5
and the default
keyboard. Tapping the
$
key switches to a key set for inputting upper-case single-
character variables.
k
$
m