# Java Program to Print Matrix in Z form

Given a square matrix of order n*n, we need to print elements of the matrix in Z form

Examples: Input : mat[][] = {1, 2, 3, 4, 5, 6, 7, 8, 9} Output : 1 2 3 5 7 8 9 Input : mat[][] = {5, 19, 8, 7, 4, 1, 14, 8, 2, 20, 1, 9, 1, 2, 55, 4} Output: 5 19 8 7 14 20 1 2 55 4

`// Java program to print a` `// square matrix in Z form` ` ` `import` `java.lang.*;` `import` `java.io.*;` ` ` `class` `GFG {` ` ` `public` `static` `void` `diag(` `int` `arr[][], ` `int` `n)` ` ` `{` ` ` `int` `i = ` `0` `, j, k;` ` ` ` ` `// print first row` ` ` `for` `(j = ` `0` `; j < n - ` `1` `; j++) {` ` ` `System.out.print(arr[i][j] + ` `" "` `);` ` ` `}` ` ` ` ` `// Print diagonal` ` ` `k = ` `1` `;` ` ` `for` `(i = ` `0` `; i < n - ` `1` `; i++) {` ` ` `for` `(j = ` `0` `; j < n; j++) {` ` ` `if` `(j == n - k) {` ` ` `System.out.print(arr[i][j] + ` `" "` `);` ` ` `break` `;` ` ` `}` ` ` `}` ` ` `k++;` ` ` `}` ` ` `// Print last row` ` ` `i = n - ` `1` `;` ` ` `for` `(j = ` `0` `; j < n; j++)` ` ` `System.out.print(arr[i][j] + ` `" "` `);` ` ` ` ` `System.out.print(` `"\n"` `);` ` ` `}` ` ` ` ` `public` `static` `void` `main(String[] args)` ` ` `{` ` ` `int` `a[][] = { { ` `4` `, ` `5` `, ` `6` `, ` `8` `},` ` ` `{ ` `1` `, ` `2` `, ` `3` `, ` `1` `},` ` ` `{ ` `7` `, ` `8` `, ` `9` `, ` `4` `},` ` ` `{ ` `1` `, ` `8` `, ` `7` `, ` `5` `} };` ` ` ` ` `diag(a, ` `4` `);` ` ` `}` `}` `// Code contributed by Mohit Gupta_OMG <(0_o)>` |

**Output:**

4 5 6 8 3 8 1 8 7 5

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