Calculator User Manual

Chapter 20: A to Z Function and Instruction Reference
291
20ATOZ.DOC TI-86, Chap 20, US English Bob Fedorisko Revised: 02/13/01 2:42 PM Printed: 02/13/01 3:05 PM Page 291 of 11820ATOZ.DOC TI-86, Chap 20, US English Bob Fedorisko Revised: 02/13/01 2:42 PM Printed: 02/13/01 3:05 PM Page 291 of 118
Equal to:
==
TEST menu
The == operator is used to
compare arguments, while
= is used to assign a value
or expression to a variable.
numberA
==
numberB
matrixA
==
matrixB
vectorA
==
vectorB
stringA
==
stringB
Tests whether the condition
argumentA
==
argumentB
is true or false. Numbers, matrices, and vectors can be
real or complex. If complex, the magnitude (modulus)
of each element is compared. Strings are case-sensitive.
•
If true (
argumentA
=
argumentB
), returns
1
.
•
If false (
argumentA ƒ argumentB
), returns
0
.
2+2==2+2
b
1
2+(2==2)+2
b
5
[1,2]==[3
N
2,
L
1+3]
b
1
"A"=="a"
b
0
listA
==
listB
Returns a list of
1
s and/or
0
s to indicate if each element
in
listA
is = the corresponding element in
listB
.
{1,5,9}=={1,
L
6,9}
b
{1 0 1}
Euler
† graph format screen
(scroll down to
second screen)
Euler
In
DifEq
graphing mode, uses an algorithm based on the
Euler method to solve differential equations. Typically,
Euler
is less accurate than
RK
but finds the solutions
much quicker.
eval
MATH MISC menu
eval
xValue
Returns a list containing the
y
values of all defined and
selected functions evaluated at a real
xValue
.
Remember that built-in equation variables
y1
and
y2
are case-sensitive:
y1=x^3+x+5
b
Done
y2=2 x
b
Done
eval 5
b
{135 10}