HP 48gII hp 48gII_user's manual_English_E_HDPMSG48E67_V2.pdf - Page 693

statement can be true (represented by the numerical value of 1. in the calculator), or false (represented by the numerical value of 0. in the calculator). The relational operators available for programming the calculator are: Operator Meaning Example == "is equal to" 'x==2' ≠ "is not equal to" '3 ≠ 2' < "is less than" 'ma' ≥ "is greater than or equal to" 'p ≥ q' ≤ "is less than or equal to" '7≤12' All of the operators, except == (which can be created by typing ,Å ,Å ), are available in the keyboard. They are also available in „° @)TEST@. Two numbers, variables, or algebraics connected by a relational operator form a logical expression that can take value of true (1.), false (0.), or could simply not be evaluated. To determine whether a logical statement is true or not, place the statement in stack level 1, and press EVAL (µ). Examples: '210' µ, result: 0. (false) In the next example it is assumed that the variable m is not initialized (it has not been given a numerical value): '2==m' µ, result: '2==m' The fact that the result from evaluating the statement is the same original statement indicates that the statement cannot be evaluated uniquely. Logical operators Logical operators are logical particles that are used to join or modify simple logical statements. The logical operators available in the calculator can be easily accessed through the keystroke sequence: „° @)TEST@ L. Page 21-44