CODEWITHSUNDEEP
javascriptrecursion
peyeruni
peyeruni

Reputation: 49

javascript recursive function returns initial value

Please, help needed! I'm trying to make a small js compounding calculator

function calculateCompound(amount, earning, remains, roi, compound) {
    if (remains > 0) {
        var ini_earning = earning;
        var accrual = amount * roi;
        earning = accrual * (1 - compound);
        var new_amount = amount + accrual - earning;
        var new_earning = ini_earning + earning;
        remains--;
        calculateCompound(new_amount, new_earning, remains, roi, compound);
    }  
    return earning + amount;
}

calculateCompound(100, 0, 5, .1, .5);

but after 5 calls it returns the initial values (105 in this case)

Many thanks in advance!

Upvotes: 1

Views: 318

Answers (1)

axelduch
axelduch

Reputation: 10849

The you never return the value from your recursion call, this is why it returns the initial value.

The idea is to have a base case which returns earning + amount And recur by returning the calculateCompound call value

function calculateCompound(amount, earning, remains, roi, compound) {
    if (remains <= 0) {
        return earning + amount;
    }

    var ini_earning = earning;
    var accrual = amount * roi;
    earning = accrual * (1 - compound);
    var new_amount = amount + accrual - earning;
    var new_earning = ini_earning + earning;

    return calculateCompound(new_amount, new_earning, remains - 1, roi, compound);
}

Upvotes: 2

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