Texas Instruments TI-86 - Using Tests in Expressions and Instructions

56
Chapter 3: Math, Calculus, and Test Operations
03MATH.DOC TI-86, Chap 3, US English Bob Fedorisko Revised: 02/13/01 2:19 PM Printed: 02/13/01 3:00 PM Page 56 of 1003MATH.DOC TI-86, Chap 3, US English Bob Fedorisko Revised: 02/13/01 2:19 PM Printed: 02/13/01 3:00 PM Page 56 of 1003MATH.DOC TI-86, Chap 3, US English Bob Fedorisko Revised: 02/13/01 2:19 PM Printed: 02/13/01 3:00 PM Page 56 of 10
valueA
‚
valueB
(greater than or equal to) Returns
1
if
valueA
is greater than or equal to
valueB
;
returns
0
if
valueA
is not greater than or equal to
valueB
;
valueA
and
valueB
must be
real numbers or lists
valueA
ƒ
valueB
(not equal to) Returns
1
if
valueA
is not equal to
valueB
; returns
0
if
valueA
is equal
to
valueB
;
valueA
and
valueB
can be real or complex numbers, lists, vectors,
matrices, or strings
Using Tests in Expressions and Instructions
The TI
-
86 Evaluation Operating System (Appendix) performs all operations except Boolean
operators before it performs relational functions. For example:
♦
The expression
2+2==2+3
evaluates to
0
. The TI
-
86 performs the addition first, and then
compares 4 to 5.
♦
The expression
2+(2==2)+3
evaluates to
6
. The TI
-
86 performs the test in parentheses
first, and then adds 2, 1, and 3.
You can use relational
functions to control program
flow (Chapter 16).