Operation Manual

Chapter 2: Math, Angle, and Test Operations 70

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.Addition is performed first because of EOS rules, and then 4 is

compared to 5.

• The expression 2+(2=2)+3 returns 6. The relational test is performed first because it is in

parentheses, and then it adds 2, 1, and 3.

TEST LOGIC (Boolean) Operations

TEST LOGIC Menu

To display the TEST LOGIC menu, press y : ~.

Note: Use Catalog Help for more syntax help when needed.Select a menu item and then press Ã to go

to a syntax help editor (if the menu item is supported).

Boolean Operators

Boolean operators are often used in programs to control program flow and in graphing to control the

graph of the function over specific values. Values are interpreted as zero (false) or nonzero (true).

valueA=valueB

valueA

>valueB

valueA<valueB

valueA

ƒvalueB

valueA

‚valueB

valueAvalueB

This operator... Returns a 1 (true) if...

TEST LOGIC

1: and

Both values are nonzero (true).

2: or

At least one value is nonzero (true).

3: xor

Only one value is zero (false).

4: not(

The value is zero (false).