Math, Angle, and Test Operations 2.25
82STAT~4.DOC TI-83 international English Bob Fedorisko Revised: 10/28/05 12:19 PM Printed: 10/28/05 12:20
PM Page 25 of 26
To display the TEST menu, press y [TEST].
This operator... Returns 1 (true) if...
TEST LOGIC
1: = Equal
2: ƒ
ot equal to
3: > Greater than
4: ‚ Greater than or equal to
5: < Less than
6: Less than or equal to
Relational operators compare valueA and valueB and return
1 if
the test is true or
0 if the test is false. valueA and valueB can be
real numbers, expressions, or lists. For
= and ƒ only, valueA and
valueB also can be matrices or complex numbers. If valueA and
valueB are matrices, both must have the same dimensions.
Relational operators are often used in programs to control
program flow and in graphing to control the graph of a function
over specific values.
valueA
=valueB valueAƒvalueB
valueA
>valueB valueA‚valueB
valueA
<valueB valueAvalueB
Relational operators are evaluated after mathematical functions
according to EOS rules (Chapter 1).
• The expression
2+2=2+3 returns 0. The TI-82 STATS
performs the addition first because of EOS rules, and then it
compares 4 to 5.
• The expression
2+(2=2)+3 returns 6. The TI-82 STATS
performs the relational test first because it is in parentheses,
and then it adds 2, 1, and 3.
TEST (Relational) Operations
TEST Menu
=, ƒ,
>, ‚,
<,
Using Tests