//Given an array of ints, return the sum of the first 2 elements in the array. If the array length is less than 2, just sum up the elements that exist, returning 0 if the array is length 0.

//

//sum2([1, 2, 3]) → 3

//sum2([1, 1]) → 2

//sum2([1, 1, 1, 1]) → 2

public int sum2(int[] nums) {

if (nums.length==0)

return 0;

if (nums.length==1)

return nums[0];

return nums[0]+nums[1];

}