Texas Instruments TI-89 Titanium User Manual page 809

Boolean expression1
If
block1
Boolean expression2
ElseIf
block2
©
Boolean expressionN
ElseIf
blockN
EndIf
Allows for program branching. If
evaluates to true, executes
expression1
expression2
imag()
MATH/Complex menu
) ⇒
expression1
imag(
expression1
imag(
argument.
Note: All undefined variables are treated as real
variables. See also
) ⇒
list1
imag(
Returns a list of the imaginary parts of the elements.
) ⇒
matrix1
imag(
Returns a matrix of the imaginary parts of the
elements.
Indirection #()
See
Input
CATALOG
Input
Pauses the program, displays the current Graph
screen, and lets you update variables xc and yc
(also rc and q c for polar coordinate mode) by
positioning the graph cursor.
When you press ¸, the program resumes.
promptString
Input [
[
promptString
Input
displays
promptString
waits for you to enter an expression, and stores the
expression in variable
If you omit
806
Then
Then
Then
Boolean expression1
. If
block1 Boolean
evaluates to false, evaluates
, etc.
expression
returns the imaginary part of the
)
.
real()
list
matrix
, page 881.
var
,]
], pauses the program,
var
on the Program I/O screen,
.
var
, "?" is displayed as a prompt.
promptString
Program segment:
©
:If choice=1 Then
: Goto option1
: ElseIf choice=2 Then
: Goto option2
: ElseIf choice=3 Then
: Goto option3
: ElseIf choice=4 Then
: Disp "Exiting Program"
Boolean
: Return
:EndIf
©
i ) ¸
imag(1+2
imag(z) ¸
y) ¸
imag(x+ i
imag({ë 3,4ë
imag([a,b;
Program segment:
©
:¦ Get 10 points from the Graph
Screen
:For i,1,10
: Input
: xc! XLIST[i]
: yc! YLIST[i]
:EndFor
©
Program segment:
©
:For i,1,9,1
: "Enter x" & string(i)! str1
: Input str1,#(right(str1,2))
:EndFor
©
Appendix A: Functions and Instructions
}) ¸ {0 ë 1 1}
i , i
0 0
d]) ¸ [
i c, i
c d
2
0
y
]