1. <script>
    2.         function maxsumArray(nums) {
    3.             let a = nums[0];
    4.             let sum = 0;
    5.             for (let num of nums) {
    6.                 if (sum + num > num) {
    7.                     sum = sum + num;
    8.                 } else {
    9.                     sum = num;
    10.                 }
    11.                 a = Math.max(a, sum);
    12.             };
    13.             console.log(a)
    14.             return a;
    15.         }
    16.         var num=[1,-1,2,3,4,-5,-6]
    17.         maxsumArray(num)
    18.     </script>