Texas Instruments TI-89, TI-92

458 Appendix A: Functions and Instructions

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 458 of 132

InputStr CATALOG

InputStr [promptString,] var

Pauses the program, displays promptString on

the Program I/O screen, waits for you to

enter a response, and stores your response as

a string in variable var.

If you omit promptString, “?” is displayed as a

prompt.

Note: The difference between Input and

InputStr is that InputStr always stores the

result as a string so that “ ” are not required.

Program segment:

:InputStr "Enter Your Name",str

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 foun

D not foun

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(ë2.5) ¸ë3.

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(ë7,2) ¸ë3

intDiv(4,5) ¸0

intDiv({12,ë14,ë16},{5,4,ë3})

{2 ë3 5}

integrate See ‰(), page 532.