Know about Excel design - Rows and Columns

Excel has rows and columns 

Rows starts from 1 and ends with 1048576. (Means starts with 1 , 2 ,3  etc.)

Columns starts from "A" and ends with "XFD" (Means starts with "A" , "B" , "C" etc)

Rows and Columns are arranged like a Matrix in mathematics.

Below are some examples for referring Row and Column of a cell.