calculate compound profit in javascript

user_13409570 0
Viewed 92

I have to calculate compound profit.

for example, I have $100, increasing 10% monthly, and I have to calculate the total profit for 12 months. And I need a profit of every month in an array.

I have tried this

let capital = 100;
let month = 12;
let profit_percentage = 10;
let total_profit;

for (i = 0; i <= month; i++) {
  total_profit = capital + (profit_percentage / 100) * 100;
  console.log(total_profit);
}
javascript
3 Answers

There seems to be a bit of missing info here, but if "profit" means the amount greater than the previous month:

Profit month over month:

const m = ((P, p) => 
  new Array(12).fill()
    .reduce((a, v) => (a.push(a.at(-1) * (1 + p)), a), [P])
    .map((v, i, a) => Math.round((a[i + 1] - v) * 100) / 100)
    .slice(0, -1)
)(100, .1);

Then, total profit:

Math.round((m.reduce((a, v) => ((a += v), a), 0) * 100)) / 100
user_42148420

Take it:

const calculate = (capital, countMonth, profitPercentage) => {
  const calc = (capital / 100) * profitPercentage;
  if (countMonth === 1) return capital + calc;
  return calculate(capital + calc, countMonth - 1, profitPercentage);
};

If you need array:

const calculate = (capital, countMonth, profitPercentage) => {
  const calc = (capital / 100) * profitPercentage;
  if (countMonth === 1) return calc;
  return (
    `${calc}, ` + calculate(capital + calc, countMonth - 1, profitPercentage)
  );
};
console.log(calculate(capital, month, profit_percentage).split(", "));
user_171753720

The compound interest calculation can be done like this:

const capital = 100, month = 12; profit_percentage = 10, 
      factor=1+profit_percentage/100;
let total=capital;

for (let i = 1; i <= month; i++) {
  total *= factor;
  console.log(i,(total-capital).toFixed(2));
}

console.log("The resulting total after 12 months is "+total.toFixed(2))

user_26100610
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