Appendix A: Functions and Instructions
829
If
Boolean expression1
Then
block1
ElseIf
Boolean expression2
Then
block2
©©©©
ElseIf
Boolean expressionN
Then
blockN
EndIf
Allows for program branching. If
Boolean
expression1
evaluates to true, executes
block1
. If
Boolean expression1
evaluates to false, evaluates
Boolean expression2
, etc.
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"
: Return
:EndIf
©
imag()
MATH/Complex menu
imag(
expression1
)
⇒
⇒
⇒
⇒
expression
imag(
expression1
)
returns the imaginary part of
the argument.
Note:
All undefined variables are treated as real
variables. See also
real()
.
imag(1+2
i
)
¸
2
imag(z)
¸
0
imag(x+
i
y)
¸
y
imag(
list1
)
⇒
⇒
⇒
⇒
list
Returns a list of the imaginary parts of the
elements.
imag({
ë
3,4
ë
i
,
i
})
¸
{0
ë
1 1}
imag(
matrix1
)
⇒
⇒
⇒
⇒
matrix
Returns a matrix of the imaginary parts of the
elements.
imag([a,b;
i
c,
i
d])
¸
[
0 0
c d
]
ImpDif()
MATH/Calculus Menu, CATALOG
ImpDif(
equation, independentVar, dependent-
Var[,order
]
)
⇒
⇒
⇒
⇒
expression
where the order defaults to 1.
Computes the implicit derivative for equations in
which one variable is defined implicitly in terms
of another.
impDif(x^2+y^2=100,x,y)
¸
-x/y
Indirection
See
#()
, page 909.
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.
Program segment:
©
:
¦
Get 10 points from the Graph
Screen
:For i,1,10
: Input
: xc
!
XLIST[i]
: yc
!
YLIST[i]
:EndFor
©
Summary of Contents for Voyage 200
Page 36: ...Getting Started 36 D B D B Press Result ...
Page 45: ...Getting Started 45 3 0 D B D D B D Press Result ...
Page 46: ...Getting Started 46 D 2 0 0 2 D B Scroll down to October and press Press Result ...
Page 60: ...Getting Started 60 B D Press Result ...
Page 139: ...Previews 139 8 Complete the operation Press 2 d Steps and keystrokes Display 5 f 2 ...
Page 453: ...Differential Equation Graphing 453 ...
Page 468: ...Tables 468 ...
Page 777: ...Activities 777 ...
