13. Suppose that int [][] triangle = new int[3][]; Write several statements to initialize triangle[0] as {1, 2}; triangle[1] as {3, 4, 5}; and triangle[2] = {6, 7, 8, 9};    14. Write public static int[] sums(int [][] arr) that returns an integer array, in which ith element is the sum of ith row of table arr.    15. Write public static boolean zeroDiagonal(int [][] arr) which returns true if the diagonal elements in table arr are all zeros.

Q: What’s the output?

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Passing Array as Argument

An array is a data structure that holds only fixed-size data and its contents are arranged in contiguous memory slots. The primary purpose of using an array is to store data items of the identical type together. An array can stockpile any one of the following types of data: int, float, char and so forth. The elements are stored from index 0, and the difference between the two indexes of the array is termed as an offset. The array has a fixed size. Once the size is defined during array declaration, it cannot be changed later.