calculate straight line declining?

Question

i have asset (say vehicle) with value of 1000 in this year... var assetCurrentBookValue = 1000 vehicle will depreciate within 5 years... that means the value will become 0 in the next 5 years... var assetLife = 5 yearly depreciation become... var assetYearlyDepreciation = assetCurrentBookValue / assetLife i need to calculate yearly value after yearly depreciation like so... year assetYearlyDepreciation   assetBookVaue 2016 200           1000 2017 200           800 2018 200           600 2019 200           400 2020 200           200 2021 200           0 i need to convert into array like so... [  [2016,1000],  [2017,800],  [2018,600],  [2019,400],  [2020,200],  [2021,0] ] here my workaround... var index = Array.from(Array(assetLife).keys()); var thisYear = new Date().getFullYear() var assetYearlyBookValue = [[thisYear,assetCurrentBookValue]] index.forEach((o) => {  assetYearlyBookValue.push([o + thisYear + 1, assetCurrentBookValue - assetYearlyDepreciation]) }); but ive got.. [  [2016,1000],  [2017,800],  [2018,800],  [2019,800],  [2020,800],  [2021,800] ] any help would be appreciated... thank Youu..

Answer 1

/* This should work */

function getAssetDepreciationByYear(initialYear, initialValue, depreciation) {

let yearlyValues = [];

// you can simply use "initialYear" and increment in the loop if you prefer

let currentYear = initialYear;

for (let value=initialValue; value>=0; value-=depreciation) {

yearlyValues.push([currentYear, value]);

currentYear++;

}

return yearlyValues;

}

getAssetDepreciationByYear(2016, 1000, 200);