http://learn.cemetech.net/index.php?action=history&feed=atom&title=TI-BASIC%3ARandintTI-BASIC:Randint - Revision history2026-05-30T18:08:35ZRevision history for this page on the wikiMediaWiki 1.43.3http://learn.cemetech.net/index.php?title=TI-BASIC:Randint&diff=1101&oldid=prevMaintenance script: Initial automated import2016-02-24T18:34:40Z<p>Initial automated import</p>
<p><b>New page</b></p><div>{{Template:TI-BASIC:Command<br />
|picture=RANDINT.GIF<br />
|summary=Generates a random integer between ''min'' and ''max'', inclusive, or a list of such numbers.<br />
|syntax=randInt(''min'',''max''[,''# of numbers''])<br />
|location=Press:<br />
# MATH to access the [[TI-BASIC:Math|Math]] menu.<br />
# LEFT to access the PRB submenu.<br />
# 5 to select randInt(, or use arrows.<br />
|compatibility=TI-83/84/+/SE<br />
|size=2 bytes<br />
}}<br />
<br />
randInt(''min'',''max'') generates a uniformly-distributed pseudorandom integer between ''min'' and ''max'' inclusive. randInt(''min'',''max'',''n'') generates a list of ''n'' uniformly-distributed pseudorandom integers between ''min'' and ''max''.<br />
<br />
''seed''→rand affects the output of randInt(.<br />
<br />
0→rand<br />
0<br />
randInt(1,10)<br />
10<br />
randInt(1,10,5)<br />
{10 2 6 5 8}<br />
<br />
= Optimization =<br />
<br />
When the lower bound of randInt( is 0, you can replace it with int(#rand to save space. For example:<br />
<br />
:randInt(0,12<br />
can be<br />
:int(13rand<br />
<br />
Similarly, if you don't want to include zero in the range, you can use a variant of 1-#int(#rand:<br />
<br />
:1-2int(2rand<br />
<br />
<br />
In this particular example, the only values that you will ever get are -1 or 1.<br />
<br />
= Formulas =<br />
<br />
The value of randInt( for a given seed can be expressed in terms of [[TI-BASIC:Rand|Rand]]:<br />
<br />
randInt(A,B)=<br />
* when A<B, A+int((B-A+1)rand<br />
* otherwise, B+int((A-B+1)rand <br />
<br />
This is identical to the output of randInt( in the sense that for the same seed, both expressions will generate the same random numbers.<br />
<br />
= Error Conditions =<br />
<br />
* '''[[TI-BASIC:Errors#domain|ERR:DOMAIN]]''' is thrown if any of the arguments is a decimal.<br />
* '''[[TI-BASIC:Errors#datatype|ERR: DATA TYPE]]''' is given if you use imaginary numbers like 6i or something like Matrices or Lists. This error is used instead of ERR:DOMAIN for "i".<br />
= Related Commands =<br />
<br />
* [[TI-BASIC:Rand|Rand]]<br />
* [[TI-BASIC:Randbin|RandBin(]]<br />
* [[TI-BASIC:Randnorm|RandNorm(]]<br />
* [[TI-BASIC:Randm|RandM(]]<br />
* [[TI-BASIC:Randintnorep|RandIntNoRep(]][[Category:TI-BASIC]]<br />
[[Category:TIBD]]</div>Maintenance script