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If a text file contains many rows and columns (say 100*100). How can I pick up a particular column and read all the values in that column and then corresponding to a particular value in that column, I need to read all the values in that row. Can anyone help please.
Regards.
The question is not clear. Do you mean columns of characters (the Nth character in a row), of numbers (“2 3 0 9 45 223 93 1” being eight columns, or something else?
In any case, you can only read the file by rows, so to extract a certain column it will be necessary to read the file into memory first, storing the data in strings. Then in each string, get the column values you are looking for. When you find it, the string in which you found it will be the row you want.