//Return the sum of the numbers in the array, returning 0 for an empty array. Except the number 13 is very unlucky, so it does not count and numbers that come immediately after a 13 also do not count.

//

//sum13([1, 2, 2, 1]) → 6

//sum13([1, 1]) → 2

//sum13([1, 2, 2, 1, 13]) → 6

public int sum13(int[] nums) {

int sum=0;

for (int i=0;i<nums.length;i++){

if (nums[i]==13)

i +=1;

else

sum=sum+nums[i];

}

return sum;

}