Texas Instruments TI-73 EXPLORER Benutzerhandbuch

    Chapter 2: Math Operations

7302ENG.DOC   CH2 Math Operations, English   Julie Hewlett   Revised: 07/29/98 11:58 AM   Printed: 05/19/99 8:58

AM   Page 32 of 32

 

Test Operations   -

 

  t

The two types of test operations included in the Text editor

are relational operators (

, 

ƒ

, 

, 

‚

, 

, and 



) and logic (Boolean)

operators (

 and 

).

Both relational and logic operators often are used in programs

to control program flow and in graphing to control the graph

as a function over specific values.

 

Relational operators compare conditionA and conditionB and

return 

 if the conditional statement is true. They return 

 if

the conditional statement is false. conditionA and conditionB

can be real numbers, expressions, or lists.
If both conditions are lists, they must have the same number

of elements. If one condition is a list and the other a non-list,

the non-list is compared with each element of the list, and a

list is returned.
Test operations are frequently used in programs.

conditionA 

 conditionB

Relational operators are evaluated after mathematical

functions according to EOS rules (Appendix B: Reference

Information). Therefore, for 2+2=2+3, the TI-73 returns 

. It

compares 4 with 5 and returns 0, because the operation is

false. For 2+(2=2)+3, the TI-73 returns 

. The relational test in

parentheses returns 1, because the operation is true. Then it

adds 2+(1)+3.