Javascript利息计算器，如何返回两种不同利率的值

我有这个收入计算器功能

EarningsCalculator.prototype.computeEarning = function (rate, investedValue) {

    var earnings = {};
    var currentState = investedValue;
    for (var i = 0; i <= 5; i++) {

            earning=currentState*rate;

            currentState = currentState + earning;

        earnings[i] = currentState;
    }

    return earnings;
}

我想要的是这个

Year1  = 1100
Year5  = 1610.51
Year10 = 2593.74246
Year15 = 4177.248169
Year20 = 6727.499949

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你可以用这个公式来计算收入

函数getPeriodicComposition（p，r，t）{ 返回数学功率（r+1，t）*p； } var originalPrincipalSum=1000， 利率=0.1， 时间=[1,5,10,15,20] times.forEach（函数（时间）{ 日志（时间，GetPeriodicComposition（原始原则，利率，时间））；

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});您可以在for循环中使用年数的模数，仅将可被5整除的年数相加。然后为第一年添加另一个或条件：

function EarningsCalculator (rate, investedValue) {

var earnings = {};
var currentState = investedValue;
var YEAR_INTERVAL = 5;
var YEARS_COMPOUNDING = 20;

for (var i = 1; i <= YEARS_COMPOUNDING; i++) {

        earning=currentState*rate;

        currentState = currentState + earning;
            if (i % YEAR_INTERVAL == 0 || i == 1) {
        earnings[i] = currentState;
    }
}

return earnings;
}

var earnings = [];
earnings = EarningsCalculator(.10,1000); 
console.log(earnings);

函数收益计算器（利率、投资价值）{
var收益={}；
var currentState=投资价值；
风险值年间隔=5；
风险值年数_复合=20；
对于（var i=1；i），您可以推导出直接公式f（年）。搜索复利。谢谢，正是我所需要的
function EarningsCalculator (rate, investedValue) {

var earnings = {};
var currentState = investedValue;
var YEAR_INTERVAL = 5;
var YEARS_COMPOUNDING = 20;

for (var i = 1; i <= YEARS_COMPOUNDING; i++) {

        earning=currentState*rate;

        currentState = currentState + earning;
            if (i % YEAR_INTERVAL == 0 || i == 1) {
        earnings[i] = currentState;
    }
}

return earnings;
}

var earnings = [];
earnings = EarningsCalculator(.10,1000); 
console.log(earnings);