Texas Instruments 84PLSECLM1L1T Guidebook - Page 70

TEST LOGIC (Boolean) Operations TEST LOGIC Menu To display the TEST LOGIC menu, press y : ~. This operator... TEST LOGIC 1: and 2: or 3: xor 4: not( Returns a 1 (true) if... Both values are nonzero (true). At least one value is nonzero (true). Only one value is zero (false). The value is zero (false). 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). and, or, xor and, or, and xor (exclusive or) return a value of 1 if an expression is true or 0 if an expression is false, according to the table below. valueA and valueB can be real numbers, expressions, or lists. valueA and valueB valueA or valueB valueA xor valueB valueA ƒ0 ƒ0 0 0 valueB ƒ0 0 ƒ0 0 returns returns returns returns and or xor 1 1 0 0 1 1 0 1 1 0 0 0 not( not( returns 1 if value (which can be an expression) is 0. not(value) Using Boolean Operations Chapter 2: Math, Angle, and Test Operations 63