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atuttle/compound_interest.cfm

Created September 10, 2010 12:41
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compound_interest.cfm
<cfscript>
numeric function getPeriods(required numeric initBalance, required numeric intRate, required numeric desiredTotal) output="false" {
//assume interest rate is of format .5 = 50%
var periods = (log(arguments.desiredTotal) - log(arguments.initBalance))/log(1+arguments.intRate);
return (ceiling(periods));
}
</cfscript>
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