Texas Instruments TI-89 - Page 493

476 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 476 of 132
ord()
MATH/String menu
ord(
string
)
⇒
integer
ord(
list1
)
⇒
list
Returns the numeric code of the first
character in character string
string
, or a list
of the first characters of each list element.
See Appendix B for a complete listing of
character codes.
ord("hello")
¸
104
char(104)
¸
"h"
ord(char(24))
¸
24
ord({"alpha","beta"})
¸
{
97 98
}
Output
CATALOG
Output
row
,
column
,
exprOrString
Displays
exprOrString
(an expression or
character string) on the Program I/O screen
at the text coordinates (
row
,
column
).
An expression can include conversion
operations such as
4
DD
and
4
Rect
. You can
also use the
4
operator to perform unit and
number base conversions.
If
Pretty Print = ON
,
exprOrString
is “pretty
printed.”
From the Program I/O screen, you can press
‡
to display the Home screen, or a program
can use
DispHome
.
Program segment:
©
:Ran
d
See
d
11
47
:C
l
rIO
:For i,
1
,90,
1
0
: Output i, ran
d(1
00
)
,"He
ll
o"
:En
d
For
©
Result after execution:
P
4
Rx()
MATH/Angle menu
P
4
Rx(
rExpression
,
q
Expression
)
⇒
expression
P
4
Rx(
rList
,
q
List
)
⇒
list
P
4
Rx(
rMatrix
,
q
Matrix
)
⇒
matrix
Returns the equivalent x-coordinate of the
(r,
q
) pair.
Note: The
q
argument is interpreted as either
a degree or radian angle, according to the
current angle mode. If the argument is an
expression, you can use
ó
or
ô
to override the
angle mode setting temporarily.
In Radian angle mode:
P
4
Rx(r,q)
¸
cos(q)
ø
r
P
4
Rx(4,60
¡
)
¸
2
P
4
Rx({
ë
3,10,1.3},{
p
/3,
ë
p
/4,0})
¸
{
ë
3/2 5
ø
‡2 1.3
}
P
4
Ry()
MATH/Angle menu
P
4
Ry(
rExpression
,
q
Expression
)
⇒
expression
P
4
Ry(
rList
,
q
List
)
⇒
list
P
4
Ry(
rMatrix
,
q
Matrix
)
⇒
matrix
Returns the equivalent y-coordinate of the
(r,
q
) pair.
Note: The
q
argument is interpreted as either
a degree or radian angle, according to the
current angle mode. If the argument is an
expression, you can use
ó
or
ô
to override the
angle mode setting temporarily.
In Radian angle mode:
P
4
Ry(r,q)
¸
sin(q)
ø
r
P
4
Ry(4,60
¡
)
¸
2
ø
‡3
P
4
Ry({
ë
3,10,1.3},{
p
/3,
ë
p
/4,0})
¸
{
ë
3
ø
‡3
2
ë
5
ø
‡2
0.
}