Golang Program To Interchange Elements Of First And Last In A Matrix Across Columns

In this article, we will write a go language program to interchange elements of the first and last column in a matrix.

Interchange Elements Of The First And Last Column In A Matrix Using An External Function

In this program, we will write a go language program to interchange the elements of the first and last column of a 3 X 3 matrix using an external function.

Algorithm

Step 1 ? Import the fmt package.

Step 2 ? Create a function to interchange the first and last columns of a matrix. In this function, we have defined two variables of integer type and assigned values to them.

Step 3 ? Use for loop to iterate over the matrix elements and store each element temporarily in the t variable initialized above.

Step 4 ? Now, store the elements of the last column in place of the first one and store back the value stored in the temporary variable to the last column.

Step 5 ? Repeat these processes till whole column values are interchanged.

Step 6 ? Now, start the main() function. Here, initialized a 3 X 3 matrix and print it on the screen.

Step 7 ? Call the matrixInter() function by passing the matrix as an argument to the function.

Step 8 ? Now, print the matrix on the screen using for loops and fmt.Println() function.

Example

package main import "fmt" // function to interchange columns func matrixInter(mat [][]int) { var t int = 0 var col int = 3 for i := 0; i < 3; i++ { t = mat[i][0] mat[i][0] = mat[i][col-1] mat[i][col-1] = t } } // creating the main() function func main() { mat := [][]int{ {10, 1, 2}, {4, 5, 6}, {8, 9, 10}, } fmt.Println("The given matrix is: \n") for i := 0; i < 3; i++ { for j := 0; j < 3; j++ { fmt.Print(mat[i][j], "\t") } fmt.Println() } fmt.Println() matrixInter(mat) fmt.Println("The matrix obtained after interchanging first and last column is: \n") for i := 0; i < 3; i++ { for j := 0; j < 3; j++ { fmt.Print(mat[i][j], "\t") } fmt.Println() } } 

Output

The given matrix is: 10	1	2 4	5	6 8	9	10 The matrix obtained after interchanging first and last column is: 2	1	10 6	5	4 10	9	8 

Interchange First And Last Column Of A Matrix Of Order 4 Or Above

In this program, we will see that how we can interchange the elements of first and last columns of a matrix of order 4 or above.

Algorithm

Step 1 ? Import the fmt package.

Step 2 ? Now, start the main() function. Here, initialize a 4 X 4 matrix and print it on the screen.

Step 3 ? Define two variables of integer type and assign values to them. Use for loop to iterate over the matrix elements and store each element temporarily in the t variable initialized above.

Step 4 ? Now, store the elements of last column in place of first one and store back the value stored in temporarily variable to the last column.

Step 5 ? Repeat these processes until whole column values are interchanged.

Step 6 ? Now, print the matrix on the screen using for loops and fmt.Println() function.

Example

package main import "fmt" // calling the main() function func main() { mat := [][]int{ {8, 9, 7, 6}, {4, 7, 6, 5}, {3, 2, 1, 8}, {9, 9, 7, 7}, } fmt.Println("The given matrix is: \n") for i := 0; i < 4; i++ { for j := 0; j < 4; j++ { fmt.Print(mat[i][j], "\t") } fmt.Println() } fmt.Println() var t int = 0 var col int = 4 for i := 0; i < 4; i++ { t = mat[i][0] mat[i][0] = mat[i][col-1] mat[i][col-1] = t } fmt.Println("The matrix obtained after interchanging first and last column is: \n") for i := 0; i < 4; i++ { for j := 0; j < 4; j++ { fmt.Print(mat[i][j], "\t") } fmt.Println() } } 

Output

The given matrix is: 8	9	7	6 4	7	6	5 3	2	1	8 9	9	7	7 The matrix obtained after interchanging first and last column is: 6	9	7	8 5	7	6	4 8	2	1	3 7	9	7	9 

Conclusion

We have successfully compiled and executed a go language program to interchange the elements of the first and last columns of a matrix along with examples. In the first example, we have used the logic to interchange elements of a 3 X 3 matrix while in the second one we are extending the logic to matrices of the order 4 or above.