title: How to write an function for traversing through a list in typescript?
body: <p>I have the following output which needs to be parsed and have to calculate the total in order to display it on the front end in angular 7:-</p>
  
  <pre><code>{
      "cart": [
          {
              "id": 28,
              "Name": "Retin a gel",
              "Price": 50,
              "Quantity": 3,
              "Cost": 150,
              "createdAt": "2019-03-15 02:44:55.047 +00:00",
              "updatedAt": "2019-03-15 02:45:04.574 +00:00"
          }
      ]
  }
  </code></pre>
  
  <p>in want to parse through this output and calculate total which sum of all total cost in typescript as a function to display it on the front end ? can some tell me how design such function?</p>