User Guide

Chapter 2: Math, Angle, and Test Operations 62
TEST (Relational) Operations
TEST Menu
To display the
TEST menu, press y :.
Ä=, ƒ, >, ‚, <, 
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.
Using Tests
Relational operators are evaluated after mathematical functions according to EOS rules
(Chapter 1).
• The expression
2+2=2+3 returns 0. The TI-84 Plus 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-84 Plus performs the relational test first because it
is in parentheses, and then it adds 2, 1, and 3.
This operator... Returns 1 (true) if...
TEST LOGIC
1: =
Equal
2: ƒ
Not equal to
3: >
Greater than
4: ‚
Greater than or equal to
5: <
Less than
6: 
Less than or equal to
valueA=valueB
valueA>valueB
valueA<valueB
valueA
ƒvalueB
valueA‚valueB
valueAvalueB