I have response from Json, I try a lot of method to get value but don't give me what I need.

this is the code:

function test() {

   var url = 'https://api.kraken.com/0/public/Ticker?pair=BTCUSD';

   var apiRequest = UrlFetchApp.fetch(url);
   var jsonResponce = JSON.parse(apiRequest);
   Logger.log(jsonResponce);
   var price = jsonResponce.result.XXBTZUSD.a; // test if can I get value from array
   Logger.log(price) // It's work here
   var fine = price.map(obj => [obj[0]]); // Now test to get value from inside array
   Logger.log(fine) // but give just first character in number
 }

This is result :