Texas Instruments PLUS TI-89 - Manual (Page 556)

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 10 points from the Graph
screen
:For i,1,10 ¦ This loops 10
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