根据输入因素计算变量值

Question

我正在尝试根据选择的数量来计算一个座位的费用，问题是第一个座位的费用与其余座位不同。

第一个 = 2250 额外座位收费995

我的语法和计算应该是什么？

//seats variable

var costOfSeats;


//Calculate cost of seats and display cost of seats

$('#range--seats').on("change", function() {

if ($(this).val(1)) {
  costOfSeats == 2250;
} else {
  costOfSeats == costOfSeats + ($(this).val(-1) * 995);// problem here
}

$('.output--seats').val("£" + costOfSeats);
}).trigger("change");

Answer 1

var n = 3; //number of seats
var sum = 0;
var extraSeat = 995;
var seat = 2250;

if (n != 0) {
    sum = seat + ((n-1) * extraSeat)
}

Answer 2

if ($(this).val(1)) {
  costOfSeats == 2250;
} else {
  costOfSeats == costOfSeats + ($(this).val(-1) * 995);// problem here
}

您正在使用 costOfSeats == costOfSeats，而不是 costOfSeats = costOfSeats。您正在比较值而不是分配它们

根据输入因素计算变量值

Calculate value of variable depending on input factors

jquery

calculator

calculation