User Guide

Randomize 649
Randomize
Description
Seeds the ColdFusion random number generator with an integer number. Seeding the generator
helps ensure that the
Rand function generates highly random numbers.
Returns
A non-random decimal number, in the range 0 – 1.
Category
Mathematical functions
Function syntax
Randomize(number)
See also
Rand, RandRange
Parameters
Usage
Call this function before calling Rand. Although this function returns a decimal number, it is not
a random number.
Example
<h3>Randomize Example</h3>
<p>Call Randomize to seed the random number generator. This helps
to ensure the randomness of numbers generated by Rand.
<cfif IsDefined("FORM.myRandomInt")>
<cfif IsNumeric(FORM.myRandomInt)>
<cfoutput><p><b>Seed value is #FORM.myRandomInt#</b>
</cfoutput><br>
<cfset r = Randomize(FORM.myRandomInt)>
<cfloop index = "i" from = "1" to = "10" step = "1">
<cfoutput>Next random number is #Rand()#</cfoutput><br>
</cfloop><br>
<cfelse>
<p>Please enter a number.
</cfif>
</cfif>
<form action = "randomize.cfm">
<p>Enter a number to seed the randomizer:
<input type = "Text" name = "MyRandomInt">
<p><input type = "Submit" name = "">
</form>
Parameter Description
number A number