JavaScript

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cs 101 mortgage calc

cs 101 mortgage calc

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capty99

6 Oct, 2008 - 06:44 PM

Post #1

the real kya

Joined: 26 Apr, 2001
Posts: 9,121

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what did i do wrong. pretty sure its the formula

javascript


   document.getElementById("MortgageCalc").addBtn.onclick = calcMonthly;
   function calcMonthly()
   {
     var monthly_payment = "";
     var elt = document.getElementById("MortgageCalc");
     var P = parseFloat (elt.principal.value);
     var R = parseFloat (elt.interest_rate.value);
	 var N = parseFloat (elt.term.value);
     monthly_payment = P * R / (1-(1/(1+R))^N);
     elt.monthly_payment.value = monthly_payment;
   }

this is what i was given by the prof : R = P * r / (1 - (1 / (1 + r)n))

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Jayman	6 Oct, 2008 - 07:05 PM Post #2
Student of Life Joined: 26 Dec, 2005 Posts: 6,819 Thanked 38 times Dream Kudos: 500 Expert In: C#, VB.NET, Java My Contributions	Hmm.. I thought the formula was: R = P * (r / (1 - (1 + r)^-n))
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no2pencil	6 Oct, 2008 - 07:07 PM Post #3
My fridge be runnin OH NOEZ! Joined: 10 May, 2007 Posts: 6,288 Thanked 54 times Dream Kudos: 2375 Expert In: Goofing Off My Contributions	Is the buyout going to effect the formula?
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capty99	6 Oct, 2008 - 08:08 PM Post #4
the real kya Joined: 26 Apr, 2001 Posts: 9,121 Thanked 15 times Dream Kudos: 550 My Contributions	QUOTE(jayman9 @ 6 Oct, 2008 - 10:05 PM) Hmm.. I thought the formula was: R = P * (r / (1 - (1 + r)^-n)) the result of that is MORE right, but wrong. at least its all positive ints as opposed to crazy negative numbers. eh.
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