Golang program to print the left diagonal of the matrix

Here, we are going to learn how to print the left diagonal of the matrix in Golang (Go Language)?
Submitted by Nidhi, on March 08, 2021 [Last updated : March 03, 2023]

Printing the left diagonal of the matrix in Golang

Problem Solution:

In this program, we will read elements of the matrix from the user and then print the left diagonal of the matrix on the console screen.

Program/Source Code:

The source code to print the left diagonal of the matrix is given below. The given program is compiled and executed successfully.

Golang code to print the left diagonal of the matrix

// Golang program to print the left diagonal of the matrix

package main

import "fmt"

func main() {
	var matrix [3][3]int

	fmt.Printf("Enter matrix elements: \n")
	for i := 0; i < 3; i++ {
		for j := 0; j < 3; j++ {
			fmt.Printf("Elements: matrix[%d][%d]: ", i, j)
			fmt.Scanf("%d", &matrix[i][j])
		}
	}

	fmt.Printf("Matrix: \n")
	for i := 0; i < 3; i++ {
		for j := 0; j < 3; j++ {
			fmt.Printf("%d ", matrix[i][j])
		}
		fmt.Printf("\n")
	}

	fmt.Printf("Left diagonal of Matrix: \n")
	for i := 0; i < 3; i++ {
		for j := 0; j < 3; j++ {
			if i == j {
				fmt.Printf("%d ", matrix[i][j])
			} else {
				fmt.Printf(" ")
			}
		}
		fmt.Printf("\n")
	}
}

Output:

Enter matrix elements:
Elements: matrix[0][2]: 33
Elements: matrix[1][0]: 44
Elements: matrix[1][1]: 55
Elements: matrix[1][2]: 66
Elements: matrix[2][0]: 77
Elements: matrix[2][1]: 88
Elements: matrix[2][2]: 99
Matrix:
11 22 33
44 55 66
77 88 99
Left diagonal of Matrix:
11
 55
  99

Explanation:

In the above program, we declare the package main. The main package is used to tell the Go language compiler that the package must be compiled and produced the executable file. Here, we imported the fmt package that includes the files of package fmt then we can use a function related to the fmt package.

In the main() function, we created 3X3 matrix using a two-dimensional array.

fmt.Printf("Enter matrix elements: \n")
for i:=0;i<3;i++{
    for j:=0;j<3;j++{
        fmt.Printf("Elements: matrix[%d][%d]: ",i,j)
        fmt.Scanf("%d",&matrix[i][j])
    }
}

In the above code, we read matrix elements from the user.

fmt.Printf("Matrix: \n")
for i:=0;i<3;i++{
    for j:=0;j<3;j++{
        fmt.Printf("%d ",matrix[i][j])
    }
    fmt.Printf("\n")
}
    
fmt.Printf("Left diagonal of Matrix: \n")
for i:=0;i<3;i++{
    for j:=0;j<3;j++{
        if(i==j){
            fmt.Printf("%d ",matrix[i][j])
        }else{
            fmt.Printf(" ")
        }
    }
    fmt.Printf("\n")
}

In the above code, we printed the matrix and left diagonal elements on the console screen.