CFLib.org – Common Function Library Project

LogN(value, base)

Last updated October 9, 2001

author

Joel Cox

Version: 1 | Requires: CF5 | Library: MathLib

Description:
Returns the logarithm of a value to the specified base.

Return Values:
Returns a simpe value.

Example:

<CFSET n=8>
  <CFSET b=2>
  <CFOUTPUT>
  Given n=8
  Given b=2
  The LogN of #n# to the base #b# is: #LogN(n, b)#
  </CFOUTPUT>

Parameters:

Name Description Required
value real number > 0. Yes
base real number > 0. Yes

Full UDF Source:

/**
 * Returns the logarithm of a value to the specified base.
 * 
 * @param value 	 real number > 0. 
 * @param base 	 real number > 0. 
 * @return Returns a simpe value. 
 * @author Joel Cox (jlcox@goodyear.com) 
 * @version 1, October 9, 2001 
 */
function LogN(x, b)
{
  if (x GT 0)
  	Return(Log(x) / Log(b));
  else
  	Return("undefined");
}
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