Texas Instruments TI-82 User Manual - Page 61
TEST TEST Relational Operations
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TEST TEST (Relational) Operations To display the TEST TEST menu, press y :. When you select from the menu, the name is copied to the cursor location. These functions are valid for lists; they return a list calculated on an element-by-element basis. TEST TEST Menu TEST 1: = 2: ƒ 3: > 4: , 5: < 6: LOGIC True if: Equal Not equal to Greater than Greater than or equal to Less than 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 numbers, expressions, lists, or matrices (Chapter 10), but they must match in type and dimension. 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 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.82 does 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 first performs the relational test because it is in parentheses, and then it adds 2, 1, and 3. Math, Angle, and Test Operations 2-15
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