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Program to print elements of a Matrix row-wise skipping alternate elements
• Last Updated : 30 Apr, 2021

Given a matrix of N*N size where N is always odd, the task is to print elements of a matrix row-wise skipping alternate elements.
Examples

```Input: mat =
{{1, 4, 3},
{2, 5, 6},
{7, 8, 9}}
Output: 1 3 5 7 9

Input: mat =
{{1, 2, 3, 4, 9},
{5, 6, 7, 8, 44},
{19, 10, 11, 12, 33},
{13, 14, 15, 16, 55},
{77, 88, 99, 111, 444}}
Output: 1 3 9 6 8 19 11 33 14 16 77 99 444 ```

Approach:

1. Start traversing the matrix.
2. For each row, check if the row number is even or odd.
• If the row is even, then print the elements at the even index of that row.
• If the row is odd, print the elements at the odd index of that row.

Below is the implementation of above approach:

## C++

 `// C++ program to print elements of a Matrix``// row-wise skipping alternate elements``#include ``using` `namespace` `std;``#define R 100``#define C 100` `// Function to print the alternate``// elements of a matrix``void` `printElements(``int` `mat[][C], ``int` `n)``{``    ``for` `(``int` `i = 0; i < n; i++) {``        ``if` `(i % 2 == 0)``            ``for` `(``int` `j = 0; j < n; j += 2)``                ``cout << mat[i][j] << ``" "``;``        ``else``            ``for` `(``int` `j = 1; j < n; j += 2)``                ``cout << mat[i][j] << ``" "``;``    ``}``}` `// Driver code``int` `main()``{``    ``int` `n = 3;``    ``int` `mat[R][C] = { { 1, 5, 3 },``                      ``{ 2, 4, 7 },``                      ``{ 9, 8, 6 } };` `    ``printElements(mat, n);` `    ``return` `0;``}`

## Java

 `// Java Program to print elements of a Matrix``// row-wise skipping alternate elements``import` `java.util.*;``import` `java.lang.*;` `class` `GFG{``// Function to print the alternate``// elements of a matrix``static` `void` `printElements(``int``[][] mat, ``int` `n)``{``    ``for` `(``int` `i = ``0``; i < n; i++)``    ``{``        ``if` `(i % ``2` `== ``0``)``            ``for` `(``int` `j = ``0``; j < n; j += ``2``)``                ``System.out.print(mat[i][j] + ``" "``);``        ``else``            ``for` `(``int` `j = ``1``; j < n; j += ``2``)``                ``System.out.print(mat[i][j] + ``" "``);``    ``}``}` `// Driver code``public` `static` `void` `main(String args[])``{``    ``int` `n = ``3``;``    ``int``[][] mat = ``new` `int``[][]{ { ``1``, ``5``, ``3` `},{ ``2``, ``4``, ``7` `},{ ``9``, ``8``, ``6` `} };` `    ``printElements(mat, n);``}``}` `// This code is contributed``// by Akanksha Rai(Abby_akku)`

## Python3

 `# Python 3 program to print elements of a Matrix``# row-wise skipping alternate elements ` `# Function to print the alternate``# elements of a matrix``def` `printElements(mat, n) :` `    ``for` `i ``in` `range``(n) :``        ``if` `i ``%` `2` `=``=` `0` `:``            ``for` `j ``in` `range``(``0``, n, ``2``) :``                ``print``(mat[i][j],end ``=` `" "``)``        ``else` `:``            ``for` `j ``in` `range``(``1``, n, ``2``) :``                ``print``(mat[i][j],end ``=``" "``)``            ` `    ` `# Driver Code``if` `__name__ ``=``=` `"__main__"` `:` `    ``n ``=` `3``    ``mat ``=` `[ [ ``1``, ``5``, ``3``],``            ``[ ``2``, ``4``, ``7``],``            ``[ ``9``, ``8``, ``6``] ]` `    ``printElements(mat , n)`  `# This code is contributed by ANKITRAI1`

## C#

 `// C# Program to print elements``// of a Matrix row-wise skipping``// alternate elements``using` `System;` `class` `GFG``{``// Function to print the alternate``// elements of a matrix``static` `void` `printElements(``int``[,] mat,``                          ``int` `n)``{``    ``for` `(``int` `i = 0; i < n; i++)``    ``{``        ``if` `(i % 2 == 0)``            ``for` `(``int` `j = 0; j < n; j += 2)``                ``Console.Write(mat[i, j] + ``" "``);``        ``else``            ``for` `(``int` `j = 1; j < n; j += 2)``                ``Console.Write(mat[i, j] + ``" "``);``    ``}``}` `// Driver code``public` `static` `void` `Main()``{``    ``int` `n = 3;``    ``int``[,] mat = ``new` `int``[,]{ { 1, 5, 3 },``                             ``{ 2, 4, 7 },``                             ``{ 9, 8, 6 }};` `    ``printElements(mat, n);``}``}` `// This code is contributed``// by ChitraNayal`

## PHP

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## Javascript

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Output:
`1 3 4 9 6`

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