Appendix A: Functions and Instructions 539
8992APPA.DOC TI-89 / TI-92 Plus: Appendix A (US English) Susan Gullord Revised: 02/23/01 1:48 PM Printed: 02/23/01 2:21 PM Page 539 of 132
!(store) §key
expression !var
list !var
matrix !var
expression !fun_name(parameter1,...)
list !fun_name(parameter1,...)
matrix !fun_name(parameter1,...)
If variable var does not exist, creates var and
initializes it to expression, list, or matrix.
If var already exists and if it is not locked or
protected, replaces its contents with
expression, list, or matrix.
Hint: If you plan to do symbolic
computations using undefined variables,
avoid storing anything into commonly used,
one-letter variables such as a, b, c, x, y, z, etc.
p/4!myvar ¸p
4
2cos(x)!Y1(x) ¸Done
{1,2,3,4}!Lst5 ¸{1 2 3 4}
[1,2,3;4,5,6]!MatG ¸[1 2 3
4 5 6]
"Hello"!str1 ¸"Hello"
¦ (comment) Program Editor/Control menu or
TI-89: ¥ d key
TI-92 Plus: 2 X key
¦ [text]
¦ processes text as a comment line, which
can be used to annotate program
instructions.
¦ can be at the beginning or anywhere in the
line. Everything to the right of ¦, to the end
of the line, is the comment.
Program segment:
©
:¦ Get
1
0 points from t
h
e Grap
h
screen
:For i,
1
,
1
0 ¦ T
h
is
l
oops
1
0
times
©
0b, 0h TI-89: µ j [B] keys TI-92 Plus: µ B keys
TI-89: µ j [H] keys TI-92 Plus: µ H keys
0b binaryNumber
0h hexadecimalNumber
Denotes a binary or hexadecimal number,
respectively. To enter a binary or hex
number, you must enter the 0b or 0h
prefix regardless of the Base mode.
Without a prefix, a number is treated as
decimal (base 10).
Results are displayed according to the
Base mode.
In Dec base mode:
0b10+0hF+10 ¸27
In Bin base mode:
0b10+0hF+10 ¸0b11011
In Hex base mode:
0b10+0hF+10 ¸0h1B