Test (Relational) Operations - Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book

TEST (Relational) Operations

TEST Menu
menu, press y :.
To display the
TEST
This operator... Returns 1 (true) if...
TEST LOGIC
Equal
1: =
Not equal to
2: ƒ
Greater than
3: >
Greater than or equal to
4: ‚
Less than
5: <
Less than or equal to
6: 
Ä=, ƒ, >, ‚, <, 
Relational operators compare
and can be real numbers, expressions, or lists. For
valueA valueB
can be matrices or complex numbers. If
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
valueA>valueB
valueA<valueB
Using Tests
Relational operators are evaluated after mathematical functions according to EOS rules
(Chapter 1).
• The expression
2+2=2+3
rules, and then it compares 4 to 5.
• The expression
2+(2=2)+3
is in parentheses, and then it adds 2, 1, and 3.
and and return 1 if the test is true or 0 if the test is false.
valueA valueB
and
valueA valueB
valueA ƒ valueB
valueA valueB
‚
valueA  valueB
returns . The TI-84 Plus performs the addition first because of EOS
0
returns . The TI-84 Plus performs the relational test first because it
6
Chapter 2: Math, Angle, and Test Operations
and ƒ only,
= valueA
are matrices, both must have the same
and also
valueB
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