title: How to get sum of value from Json Array in Angular2(Typescript)
body: <p>I have a Json Response</p>
  
  <pre><code>"carts": {
              "value": [
                  {
  
                      "Amt": 40
  
                  },
                  {
                      "Amt": 20.25
  
                  },
                  {
  
                      "Amt": 10.30
  
                  }
  
              ]
          }
  </code></pre>
  
  <p>I want to get the sum value of Amt field and the output should be 70.55
  How to get this using Typescript.I am new to typescript.
  Can anyone please help me with this?</p>