Why code doesn't reach last column in matrix?

I had to write code in C# that should determine the minimum and maximum in all even and odd columns, but the code does not include the last column at all, which in case the matrix is ​​3*4, would be odd. it does not check the numbers in the last column at all.

       `int min_o = Int32.MaxValue;
        int max_o = Int32.MinValue;
        int min_e = Int32.MaxValue;
        int max_e = Int32.MinValue;
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < n; j++)
            {
                if (j % 2 != 0) 
                {
                    if (a[i, j] < min_o)
                        min_o = a[i, j];
                    else if (a[i, j] > max_o)
                        max_o = a[i, j];
                }
                else 
                    {

                        if (a[i, j] < min_e)
                            min_e = a[i, j];
                        else if (a[i, j] > max_e)
                            max_e = a[i, j];
                    }
            }`

max_o and min_o are used for maximum and minimum for odd columns, and max_e and min_e are used for even columns.

here is example of what input and output for my program is:

n: 3
m: 4
1 2 3 4
5 4 6 7
9 1 7 9

Minimum for odd columns is: 1, maximum for odd columns is: 4Minimum for even columns is: 1, maximum for even columns is: 9

I tried to input 4*5 matrix, so that last column can be even, because I thought, maybe there is a problem when the last column is odd, but same problem is there too.

>Solution :

I think it’s because you are using n in the inner for loop rather than m (assuming n is the number of rows and m is the number of columns)

I should be

for (int j = 0; j < m; j++)

NOT

for (int j = 0; j < n; j++)