Java program to check given matrix is diagonal matrix

Program

class DiagonalMatrix
{
	public static void main(String args[])
	{
		int[][] a = new int[][] { { 1, 0, 1},{ 0, 3, 0},{ 0, 0, 3} };
		boolean setValue = true;

		abc: for(int i = 0;i < a.length;i++)
		{
			for(int j = 0;j < a[i].length;j++)
			{
				if(i == j)
				{
					if(a[i][j] == 0)
					{
						setValue = false;
						break abc;
					}
				}
				else if(a[i][j] != 0)
				{
					setValue = false;
					break abc;
				}
			}
		}
        
		System.out.println("The Given Matrix Value:");
		for(int i = 0;i < a.length;i++)
		{
			for(int j = 0;j < a[i].length;j++)
			{
				System.out.print(a[i][j] + " ");
			}
			System.out.println();
		}
		
		if(setValue == true)
		{
			System.out.println("The Given Matrix is a Diagonal Matrix");
		}
		else
		{
			System.out.println("The Given Matrix is not a Diagonal Matrix");
		}
	}
}

Output

The Given Matrix Value:
1 0 0
0 3 0
0 0 3
The Given Matrix is a Diagonal Matrix

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