CFLib.org – Common Function Library Project

Description:
Calculate the compound interest after n years.

Return Values:
Returns a numeric value.

Example:

<cfoutput>
Future value:
<P>
100 dollars for 1 year at 10%: #DollarFormat(compoundInterest(0.1, 100, 1))#<br>
100 dollars for 2 years at 10%: #DollarFormat(compoundInterest(0.1, 100, 2))#<br>
100 dollars for 3 years at 10%: #DollarFormat(compoundInterest(0.1, 100, 3))#
</cfoutput>

Parameters:

Full UDF Source:

/**
 * Calculate the compound interest after n years.
 * 
 * @param r      Interest rate (3% = 0.03). 
 * @param p      Principal 
 * @param t      Duration of the loan in years. 
 * @return Returns a numeric value. 
 * @author Stephan Scheele (stephan@stephan-t-scheele.de) 
 * @version 1, April 23, 2002 
 */
function compoundInterest(r, p, t){
  return (p* (1 + r)^t);
}