JS函数嵌套if

# 定义函数
function discountedPrice(cost){
    let discount;
    # if语句
    if (cost > 2000) {
        discount = cost * 0.8;
        cost = cost - discount;
    }else if(cost >= 500){
        discount = cost * 0.1;
        cost = cost - discount;
    }
    console.log(cost);
}
# 调用函数
discountedPrice(800);