Difference between revisions of "CoCoA:Rand"
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In the first form, the function returns a random integer. In the | In the first form, the function returns a random integer. In the | ||
second, it returns a random integer between X and Y, inclusive. (Note: | second, it returns a random integer between X and Y, inclusive. (Note: | ||
| − | |X-Y| should be less than <formula>2^33</formula> to assure a more random distribution.) | + | |X-Y| should be less than <formula>2^{33}</formula> to assure a more random distribution.) |
<par/> | <par/> | ||
NB: every time you restart CoCoA the sequence of random numbers will | NB: every time you restart CoCoA the sequence of random numbers will | ||
Latest revision as of 13:31, 26 April 2008
Rand
random integer
Description
In the first form, the function returns a random integer. In the
second, it returns a random integer between X and Y, inclusive. (Note:
|X-Y| should be less than <formula>2^{33}</formula> to assure a more random distribution.)
NB: every time you restart CoCoA the sequence of random numbers will
be the same (as in other programming languages). If you want total
randomness read <ttref>Seed</ttref>.
Example
Rand(); 6304433354 ------------------------------- Rand(1,100); 8 ------------------------------- Rand(100,1); 14 ------------------------------- Rand(-10^4,0); -2747 -------------------------------
Syntax
Rand():INT Rand(X:INT,Y:INT):INT
<type>integer</type> <type>miscellaneous</type>
