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利息利率 #63

Description

@funme
// 获取存款利息 yieldRate(投资利息/%),day(存储时间/天),money(钱/元)
// 默认投资1天, 投入10000元
function depositInterest(yieldRate, day=1, money=10000) {
    return (money*yieldRate/100)/365*day
}


// 购买商品免息等值换算 price(商品金额/元),stage(免息时间/月),yieldRate(投资利息/%)
// 默认12期免息,投资利息3.8%
function freeInterest(price, stage=12, yieldRate=3.8) {
    let earnOneinterest = 0 
    let total = 0 
    for(let i=1;i<stage+1;i++){
        earnOneinterest = (price-price/stage*i)*(yieldRate/100)/12
        total+= earnOneinterest
        console.log('第'+i+'期',earnOneinterest.toFixed(5)+'元')
    }
    return (total).toFixed(5)
}

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