Hp Prime Graphing Calculator Manuel d'utilisateur télécharger pdf (Page 588)

100

101

582 Basic integer arithmetic

represents 228

. In this case, the base marker h indicates that the

number is to interpreted as a hexadecimal number: E4

Note that with integer arithmetic, the result of any calculation that

would return a remainder in floating-point arithmetic is truncated:

only the integer portion is presented. Thus #100b/#10b gives the

correct answer: #10b (since 4

is 2

). However, #100b/

#11b gives just the integer component of the correct result: #1b.

Note too that the accuracy of integer arithmetic can be limited by

the integer wordsize. The wordsize is the maximum number of bits

that can represent an integer. You can set this to any value

between 1 and 64. The smaller the wordsize, the smaller the

integer that can be accurately represented. The default wordsize

is 32, which is adequate for representing integers up to

approximately 2 × 10

. However, integers larger than that would

be truncated, that is, the most significant 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 affects 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

suffix. But if you wanted to enter E4

, you need to enter it with the

suffix: #E4h. (The HP Prime adds any omitted base markers when

the calculation is displayed in history.)

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Hp Prime Graphing Calculator Manuel d'utilisateur Page 588

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