Program to swap upper diagonal elements with lower diagonal elements of matrix.

22 Mar, 2022
Given a square matrix, swap upper diagonal elements of matrix with lower diagonal elements of matrix.Examples :  
Input:   2  3  5  6
         4  5  7  9
         8  6  4  9
         1  3  5  6

Output:  2  4  8  1
         3  5  6  3
         5  7  4  5
         6  9  9  6

Input:   1  2  3 
         4  5  6
         7  8  9

Output:  1  4  7
         2  5  8
         3  6  9
 
Below is the implementation of above idea :  
C++
Java
Python 3
C#
PHP
Javascript
Javascript
// CPP Program to implement matrix// for swapping the upper diagonal// elements with lower diagonal// elements of matrix.#include <bits/stdc++.h>#define n 4using namespace std; // Function to swap the diagonal// elements in a matrix.void swapUpperToLower(int arr[n][n]){    // Loop for swap the elements of matrix.    for (int i = 0; i < n; i++) {        for (int j = i + 1; j < n; j++) {            int temp = arr[i][j];            arr[i][j] = arr[j][i];            arr[j][i] = temp;        }    }         // Loop for print the matrix elements.    for (int i = 0; i < n; i++) {        for (int j = 0; j < n; j++)            cout << arr[i][j] << " ";        cout << endl;    }} // Driver function to run the programint main(){    int arr[n][n] = { { 2, 3, 5, 6 },                    { 4, 5, 7, 9 },                    { 8, 6, 4, 9 },                    { 1, 3, 5, 6 } };     // Function call    swapUpperToLower(arr);    return 0;} }
// java Program to implement matrix// for swapping the upper diagonal// elements with lower diagonal// elements of matrix.import java.io.*; class GFG{    static int n = 4;         // Function to swap the diagonal    // elements in a matrix.    static void swapUpperToLower(int arr[][])    {        // Loop for swap the elements of matrix.        for (int i = 0; i < n; i++)        {            for (int j = i + 1; j < n; j++)            {                int temp = arr[i][j];                arr[i][j] = arr[j][i];                arr[j][i] = temp;            }        }                 // Loop for print the matrix elements.        for (int i = 0; i < n; i++)        {            for (int j = 0; j < n; j++)                System.out.print( arr[i][j] +" ");                System.out.println();        }             }         // Driver code    public static void main (String[] args)    {        int arr[][] = { { 2, 3, 5, 6 },                        { 4, 5, 7, 9 },                        { 8, 6, 4, 9 },                        { 1, 3, 5, 6 } };         // Function call        swapUpperToLower(arr);                 }} // This code is contributed by vt_m.
# Python Program to implement matrix# for swapping the upper diagonal# elements with lower diagonal# elements of matrix. # Function to swap the diagonal# elements in a matrix.def swapUpperToLower(arr):    n = 4;         # Loop for swap the elements    # of matrix.    for i in range(0, n):        for j in range(i + 1, n):            temp = arr[i][j];            arr[i][j] = arr[j][i];            arr[j][i] = temp;             # Loop for print the matrix elements.    for i in range(0, n):        for j in range(0, n):            print(arr[i][j], end = " ");        print(" ");     # Driver Code arr = [[2, 3, 5, 6 ],[ 4, 5, 7, 9 ],       [8, 6, 4, 9 ],[ 1, 3, 5, 6 ]]; # Function callswapUpperToLower(arr); # This code is contributed# by Shivi_Aggarwal
// C# Program to implement matrix// for swapping the upper diagonal// elements with lower diagonal// elements of matrix.using System; class GFG{    static int n = 4;         // Function to swap the diagonal    // elements in a matrix.    static void swapUpperToLower(int [,]arr)    {        // Loop for swap the elements of matrix.        for (int i = 0; i < n; i++)        {            for (int j = i + 1; j < n; j++)            {                int temp = arr[i, j];                arr[i, j] = arr[j, i];                arr[j, i] = temp;            }        }                 // Loop for print the matrix elements.        for (int i = 0; i < n; i++)        {            for (int j = 0; j < n; j++)                Console.Write(arr[i, j] +" ");                Console.WriteLine();        }             }         // Driver code    public static void Main ()    {        int [,]arr = {{ 2, 3, 5, 6 },                      { 4, 5, 7, 9 },                      { 8, 6, 4, 9 },                      { 1, 3, 5, 6 }};         // Function call        swapUpperToLower(arr);                 }} // This code is contributed by vt_m.
<?php// PHP Program to implement matrix// for swapping the upper diagonal// elements with lower diagonal// elements of matrix. $n = 4;// Function to swap the diagonal// elements in a matrix.function swapUpperToLower($arr){    global $n;         // Loop for swap the elements of matrix.    for ($i = 0; $i < $n; $i++)    {        for ($j = $i + 1; $j < $n; $j++)        {            $temp = $arr[$i][$j];            $arr[$i][$j] = $arr[$j][$i];            $arr[$j][$i] = $temp;        }    }         // Loop for print the matrix elements.    for ($i = 0; $i < $n; $i++)    {        for ($j = 0; $j < $n; $j++)            echo($arr[$i][$j] . " ");        echo("\n");    }} // Driver Code$arr = array(array(2, 3, 5, 6),             array(4, 5, 7, 9),             array(8, 6, 4, 9),             array(1, 3, 5, 6)); // Function callswapUpperToLower($arr); // This code is contributed by Ajit.?>
<script>// JavaScript Program to implement matrix// for swapping the upper diagonal// elements with lower diagonal// elements of matrix.var arr = [ [ 2, 3, 5, 6 ],                    [ 4, 5, 7, 9 ],                    [ 8, 6, 4, 9 ],                    [ 1, 3, 5, 6 ]                ]; var n = arr.length;      // Loop for swap the elements of matrix.    for (var i = 0; i < n; i++)    {        for ( var j = i + 1; j < n; j++)        {             var temp = arr[i][j];            arr[i][j] = arr[j][i];            arr[j][i] = temp;        }    }         // Loop for print the matrix elements.    for (var i = 0; i < n; i++) {        for ( var j = 0; j < n; j++)            {                document.write( arr[i][j] + " ");            }        document.write("<br>");    } // This code is contributed by SoumikMondal</script>
<script>// java script Program to implement matrix// for swapping the upper diagonal// elements with lower diagonal// elements of matrix.     let n = 4;         // Function to swap the diagonal    // elements in a matrix.    function swapUpperToLower(arr)    {        // Loop for swap the elements of matrix.        for (let i = 0; i < n; i++)        {            for (let j = i + 1; j < n; j++)            {                let temp = arr[i][j];                arr[i][j] = arr[j][i];                arr[j][i] = temp;            }        }                 // Loop for print the matrix elements.        for (let i = 0; i < n; i++)        {            for (let j = 0; j < n; j++)                document.write( arr[i][j] +" ");                document.write("<br>");        }             }         // Driver code             let arr = [[2, 3, 5, 6 ],                        [ 4, 5, 7, 9 ],                        [ 8, 6, 4, 9 ],                        [ 1, 3, 5, 6 ]];         // Function call        swapUpperToLower(arr);         // contributed by sravan kumar</script>
Output :  
2 4 8 1 
3 5 6 3 
5 7 4 5 
6 9 9 6 
Time Complexity: O(N2)
Auxiliary Space: O(1) 
vt_m
jit_t
Shivi_Aggarwal
SoumikMondal
sravankumar8128
rohitkumarsinghcna
Matrix
Matrix
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