HP 48gII Graphing Calculator Manual do Utilizador descarregar pdf (Página 693)

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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” ‘m<n’

> “is greater than” ‘10>a’

≥ “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:

‘2<10’

µ, result: 1. (true)

‘2>10’

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.

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