Write a Java program to check whether a 4 × 4 matrix (4 rows and 4 columns) is a magic square. A magic square is an N × N matrix in which the sums of each row, each column and the two diagonals add up to N (N2 + 1)/2 which is the magic number. Give separate functions to check row sums, column sums and diagonal sums. All matrix entries are unique numbers from 1 to N2. Submit the program as a .java file.   Suppose you wanted to test a famous example of a magic square:   16     3       2      13 5       10     11     8 9       6       7      12 4       15     14     1

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Array

The simplest way to start thinking about an array is as a collection, or a set of elements. In programming, these elements may be constants, variables, functions and pointers.