cfdocs

randRange

Generates a random integer between two specified numbers. Requests for random integers that are greater than 100,000,000 result in non-random numbers, to prevent overflow during internal computations.

randRange(number1, number2 [, algorithm])

returns numeric

Argument Reference

Name	Type	Required	Default	Description	Values
number1	numeric	Yes
number2	numeric	Yes
algorithm	string	No	CFMX_COMPAT	CF7+ The algorithm to use to generated the random number.	/Users/garethedwards/development/github/cfdocs/docs/functions/randrange.md	NativePRNGNonBlocking

Tag Example

The following example calls the Randomize function to seed the random number generator and generates 10 random numbers.

<cfset r = randomize(7, "SHA1PRNG")> 
 <cfset local.myInt = 1 /> 
 <cfset local.myInt2 = 999 /> 
<!--- Generate and display the random number. ---> 
 <cfoutput><p><b> 
 RandRange returned: #randRange(local.myInt, local.myInt2, "SHA1PRNG")# 
 </cfoutput></b></p>

Script Example

<cfscript> 
 bytes = []; 
 bytecount = 32; 
 arrayResize( bytes, byteCount ); 
 for (  i = 1 ; i <= byteCount ; i++ ) { 
  bytes[ i ] = randRange( -128, 127, "SHA1PRNG" ); 
         } 
 </cfscript> 
 <cfdump var="#bytes#" />

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