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Counting compound interest for javascript - browser and node.js
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kfiku/InterestJS
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Calculate compound interest in js (browser/node.js/browserify).
Install the module with:
npm install interestjsor with Bower:
bower install interest-js --savevarInterest=require('interestjs');varinst=Interest(singleAmount,months,interestRate,params);// returns{payments :[{capital:number,interest:number,tax:number,capitalSum:number,sum:number}],interestSum :number,capitalSum :number,taxSum :number,sum :number}
Interest(singleAmount, months, interestRate, params)
| Argument | type | default | Description |
|---|---|---|---|
| singleAmount | number | *required | single saving amount (monthly) |
| months | number | *required | months of savings |
| interestRate | number | *required | interest rate in percent (ex. 3.5) |
| params | object | undefined | parameters |
- tax - persentage tax on interest
- dynamicAmount - function for getting next amount of savings
- startAmount - amount of money put at the begining
{installments :[{capital :number,interest :number,installment :number,remain :number}],amount :number,interestSum :number,capitalSum :number,sum :number}
nodejs / browserify example
varInterest=require('../lib/interest.js');varinterest_1=newInterest(1000,12,5,{tax:19});console.log(interest_1);// systematic savings over in 12 montchs with 5% interest rate and interest tax 19% (in poland we have 19%)
Browser example:
<scriptsrc="../../lib/interest.js"></script><script>varinterest_1=newInterest(1000,12,5,{tax:19});</script>
more exampleshere
In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality.
- fixing typo intrest -> interest
- update dependencies
- add dynamic amount param to have controll of every saving
- init commit
Copyright (c) 2014 Grzegorz Klimek
Licensed under the MIT license.
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