20060301
1-6-12
Input
I
Using Single-character Variables
As its name suggests, a single-character variable is a variable name that consists of a single
character like “
a
” or “
x
”. Input of single-character variable names is subject to different rules
than input of a series of multiple characters (like “abc”).
S
To input a single-character variable name
Any character you input using any one of the following techniques is always treated as a
single-character variable.
• Tapping any key in the math (mth) keyboard’s
5
key set (page 1-6-10)
• Tapping any key in the 2D keyboard’s
5
key set (page 1-6-17)
• Tapping the
7
,
8
,
9
or
:
key to the left of the
key of the math (mth) keyboard or
2D keyboard
• Pressing the
7
,
8
, or
'
keypad key
If you use the above key operations to input a series of characters, each one is treated as a
single-character variable. Inputting
,
!
,
"
, for example, is treated as the mathematical
expression a
s
b
s
c, and not as the characters “abc”.
Tip
• The single-character variables described above make it possible for you to perform calculations
as they appear in your textbook.
Example 1:
5
!"
U
Example 2:
78
Tip
• When you input a single-character variable, its name appears on the display as an italicized bold
character. This is simply to let you know that the letter is a single-character variable name.
To Next Page
Loading...
