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Javascript Sum Array of Objects

In this tutorial, you will learn how to add or sum an array of objects in JavaScript. An array of objects is a collection of data that has both properties and values, such as [{productName: "iPhone 13", price: 999}, {productName: "Samsung Galaxy S21", price:899 }]. To add or sum the values of a specific property in an array of objects, we can use a loop and the += operator. In this tutorial, we will use the += operator to add the price of all the objects in the array and store the result in a variable called totalPrice.

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Javascript Add Array of Object

 <script>
  function() {
   let arrayOfProducts = [{
    productName: "iPhone 13",
    price: 999
   },{
    productName: "MacBook Pro",
    price: 1799
   }, {
    productName: "iPhone 13",
    price: 999
   }, {
    productName: "Samsung Galaxy S21",
    price: 899
   }];

   function calculateTotalPrice() {
    let totalPrice = 0;
    arrayOfProducts.forEach(product => {
     totalPrice += product.price;
    });
   }
 </script>

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Javascript Sum Array of Objects

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Javascript Add Array of Object