Randomize |
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Description
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Seeds the ColdFusion random number generator with an integer number. Seeding the generator helps ensure that the Rand function generates highly random numbers.
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Returns
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A non-random decimal number, in the range 0 - 1.
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Category
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Mathematical functions
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Function syntax |
Randomize(number)
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See also
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Rand, RandRange
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Parameters
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Parameter |
Description |
number |
A number |
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Usage
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Call this function before calling Rand. Although this function returns a decimal number, it is not a random number.
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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>
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