Texas Instruments Titanium TI-89 User Manual

832 Appendix A: Functions and Instructions
inString() MATH/String menu
inString( srcString , subString [, start ]) ⇒
⇒⇒
⇒ integer
Returns the character position in string srcString at
which the first occurrence of string
subString
begins.
start , if included, specifies the character position
within
srcString where the search begins. Default
= 1 (the first character of
srcString ).
If
srcString does not contain subString or start is >
the length of
srcString , returns zero.
inString("Hello there","the")
¸ 7
"ABCEFG"! s1:If inString(s1,
"D")=0:Disp "D not found."
¸
D not found.
int() CATALOG
int( expression ) ⇒
⇒⇒
⇒ integer
int(
list1 ) ⇒
⇒⇒
⇒ list
int(
matrix1 ) ⇒
⇒⇒
⇒ matrix
Returns the greatest integer that is less than or
equal to the argument. This function is identical
to
floor().
The argument can be a real or a complex number.
For a list or matrix, returns the greatest integer of
each of the elements.
int(ë 2.5) ¸ ë 3.
int([-1.234,0,0.37])
¸
[-2. 0 0.]
intDiv() CATALOG
intDiv( number1 , number2 ) ⇒
⇒⇒
⇒ integer
intDiv( list1 , list2 ) ⇒
⇒⇒
⇒ list
intDiv( matrix1 , matrix2 ) ⇒
⇒⇒
⇒ matrix
Returns the signed integer part of argument 1
divided by argument 2.
For lists and matrices returns the signed integer
part of argument 1 divided by argument 2 for
each element pair.
intDiv(ë 7,2) ¸ ë 3
intDiv(4,5)
¸ 0
intDiv({12,ë 14,ë 16},{5,4,ë 3})
¸
{2 ë 3 5}
integrate See ‰
‰‰
‰(), page 907.
iPart() MATH/Number menu
iPart( number ) ⇒
⇒⇒
⇒ integer
iPart(
list1 ) ⇒
⇒⇒
⇒ list
iPart(
matrix1 ) ⇒
⇒⇒
⇒ matrix
Returns the integer part of the argument.
For lists and matrices, returns the integer part of
each element.
The argument can be a real or a complex number.
iPart(ë 1.234) ¸ ë 1.
iPart({3/2,ë 2.3,7.003})
¸
{1 ë 2. 7.}
isArchiv() CATALOG
isArchiv(var_name) ⇒
⇒⇒
⇒ true,false
Determines if var_name is archived or not.
Returns
true if var_name is archived. Returns
false if var_name is not archived.
isArchiv(PROG1) ¸ True
isClkOn() CATALOG
isClkOn() ⇒
⇒⇒
⇒ true,false
Determines if the clock is ON or OFF. Returns
true if the clock is ON. Returns false if the clock is
OFF.

Texas Instruments Titanium TI-89 Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
Memory	188 KB RAM, 2.7 MB Flash ROM
Type	Graphing Calculator
Display	Monochrome
Processor	Motorola 68000
Processor Speed	12 MHz
Power Source	4 AAA batteries
Connectivity	USB
Programming	TI-BASIC, Assembly
Operating System	AMS (Advanced Mathematics Software)