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JavaScript

Ossian MacDonald
Ossian MacDonald
2,175 Points
Posted by Ossian MacDonald
Ossian MacDonald
2,175 Points

Trouble with Math.pow

HI All,

I am having trouble with the math.pow function. I am trying to replicate this formula:

monthlyPayment = principal * ( monthlyInterest/ (1 - (1 + monthlyInterest) ^ -numberOfMonths))

But, the number that I get from this calculation is far too small. So, I think that I am not writing the formula correctly in JS. I would really appreciate you taking a look at the relevant code:

http://cdpn.io/EdCKc

Thanks so much!

1 Answer

James Barnett
James Barnett
39,199 Points
James Barnett
James Barnett
39,199 Points

When using a function you need parentheses around the arguments Math.pow(argX, argY). So in your case that would be Math.pow(1+monthlyInterest, -numberOfMonths)

Also you forgot to end a few lines with semi-colons.

There's a JavaScript syntax checker built into codepen called JSHint, press ctrl+shift+7 to show JSHint messages and ctrl+shift+8 to hide JSHint messages.