JS realizes the calculation of the total price of goods in the shopping cart

JS calculates the total price of goods in the shopping cart for your reference. The specific contents are as follows

Question requirements:

There is information about several products in the shopping cart, including the name, unit price, and quantity of the products. The total price of the products in the shopping cart is calculated.

Specific ideas:

Product information is obtained by creating product objects. The sum of several products is achieved by creating an array to place the products. The price is then calculated by traversing the array and reading the specified attributes.

Specific code:

<script type="text/javascript">
 // Total price variable var sum = 0;
 // Goods object function Goods(name,price,amount){
 this.name = name;
 this.price = price;
 this.amount = amount;
 // this.add = fun();
  }
 //Define and declare a product instance var goods1 = new Goods("Pen",100,1);
 var goods2 = new Goods("paper towel",10,1);
 var goods3 = new Goods("Workbook",100,2);
  
 // Create a function to calculate the total price function totalPrice(){
 // Put objects into array var arr = new Array(goods1,goods2,goods3);
 // Add the prices of each product by traversing for(var i in arr){
  sum = sum + (arr[i].price * arr[i].amount);
  };
  console.log(sum);
 };
  
 console.log(goods1);
 console.log(goods2);
 console.log(goods3);
 totalPrice();
</script>

Running results:

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