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20090601
Problem
Use this keyboard:
Operation
mth abc cat 2D
What is the sign of
–3.4567? –1
(signum returns –1 for a
negative value, 1 for a
positive value, “Undefined” for
0, and
A
¦
A
µ
for an
imaginary number.)
Func [signum]
3.4567
U
What is the integer part of
–3.4567? –3
CALC Func
3.4567
U
What is the decimal part of
–3.4567? –0.4567
Func [frac]
3.4567
U
What is the greatest integer
less than or equal to
–3.4567? –4
Func [intg]
3.4567
U
What is –3.4567 rounded to
two decimal places? –3.46
Func [fRound]
3.4567
2
U
What is –34567 rounded to
four significant digits?
–34570
Func [sRound]
34567
4
U
*
* To round to 10 digits, specify “0” for the second argument.
I
Random Number Generator (rand, randList, randNorm, randBin, RandSeed)
• The ClassPad random number generator can generate truly random numbers (non-
sequential random numbers) and random numbers that follow a particular pattern (sequential
random numbers). Using the “randList” function, you can generate a list whose elements
contain random numbers. There are nine different patterns for generation of sequential
random numbers. Use the “RandSeed” command to switch between non-sequential and
sequential random number generation, and to select the sequential random number
generation pattern.
S
ClassPad Operation
(1) Use the “RandSeed” command to configure random number generation settings, if
required.
(2) Use the “rand”, “randList”
, “randNorm”, or “randBin” function to generate the random
numbers.
2-4-6
Function Calculations