HP Prime Graphing Wireless Calculator Uživatelský manuál stáhnout pdf (Strana 688)

100

101

which is adequate for representing integers up to approximately 2 × 10

. However, integers larger than that

would be truncated, that is, the most signicant bits (that is, the leading bits) would be dropped. thus the

result of any calculation involving such a number would not be accurate.

The default base

Setting a default base only aects the entry and display of numbers being used in integer arithmetic. If you

set the default base to binary, 27 and 44 will still be represented that way in Home view, and the result of

adding those numbers will still be represented as 71. However, if you entered #27b, you would get a syntax

error, as 2 and 7 are not integers found in binary arithmetic. You would have to enter 27 as #11011b (since

=11011

Setting a default base means that you do not always have to specify a base marker for numbers when doing

integer arithmetic. The exception is if you want to include a number from the non-default base: it will have to

include the base marker. Thus if your default base is 2 and you want to enter 27 for an integer arithmetic

operation, you could enter just #11011 without the b suix. But if you wanted to enter E4

, you need to enter

it with the

suix: #E4h. (The HP Prime adds any omitted base markers when the calculation is displayed in

history.)

Note that if you change the default base, any calculation in history that involves integer arithmetic for which

you did not explicitly add a base marker will be redisplayed in the new base. In the following gure, the rst

calculation explicitly included base markers (b for each operand). The second calculation was a copy of the

rst but without the base markers. The default base was then changed to hex. The rst calculation remained

as it was, while the second—without base markers being explicitly added to the operands—was redisplayed

in base 16.

640 Chapter 29 Basic integer arithmetic

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