Texas Instruments TI-89 - Page 475

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
1
©
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
."
¸
D not foun
d
.
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 532.