Q:

Dealing with implementing a Database to a Datatable

while I was trying to convert my Database to a Datatable, I found information about about how to add Columns to a Database. The Code looked a little like this:
string it;
DataTable another_tranTab = new DataTable();
another_tranTab.Columns.Add("Column1", typeof(String)); 
int a = 0;
int b = 0;

while (a < tranTable.Rows.Count)
{
    it = Convert.ToString(tranTable.Rows[a][0]);
    if (it == "False")
    {
        DataRow newRow = another_tranTab.NewRow();
        newRow["Column1"] = a;
        another_tranTab.Rows.Add(newRow);
        b = b + 1;
    }
    a++;
}

My question is what this part stands for it = Convert.ToString(tranTable.Rows[a][0]);
I don't really understand what the [0] stands for.

A:

Columns     0          1               2 

           Name       City            Age

   Row 0   Guilherme  Pres. Prud.     23

   Row 1   Lucas      São Paulo       18

   Row 2   Pedro      Rio de Janeiro  35

How do I get city from Pedro?
I must get the line 2 and col 1.
Then: dataTable[1][2]. //dataTable[col1][row2].

