HP 48gII hp 48gII_user's manual_English_E_HDPMSG48E67_V2.pdf - Page 695
Program branching, Branching with IF
UPC - 829160013183
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The calculator includes also the logical operator SAME. This is a nonstandard logical operator used to determine if two objects are identical. If they are identical, a value of 1 (true) is returned, if not, a value of 0 (false) is returned. For example, the following exercise, in RPN mode, returns a value of 0: 'SQ(2)' ` 4 ` SAME Please notice that the use of SAME implies a very strict interpretation of the word "identical." For that reason, SQ(2) is not identical to 4, although they both evaluate, numerically, to 4. Program branching Branching of a program flow implies that the program makes a decision among two or more possible flow paths. The User RPL language provides a number of commands that can be used for program branching. The menus containing these commands are accessed through the keystroke sequence: „°@)@BRCH@ This menu shows sub-menus for the program constructs The program constructs IF...THEN..ELSE...END, and CASE...THEN...END will be referred to as program branching constructs. The remaining constructs, namely, START, FOR, DO, and WHILE, are appropriate for controlling repetitive processing within a program and will be referred to as program loop constructs. The latter types of program constructs are presented in more detail in a later section. Branching with IF In this section we presents examples using the constructs IF...THEN...END and IF...THEN...ELSE...END. Page 21-46
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