A spreadsheet is essentially a matrix of rows and columns.
Consider a sheet of paper on which horizontal and vertical lines are
drawn to yield a rectangular grid. The grid namely a cell, is the result
of the intersection of a row with a column. Such a structure is called a
Spreadsheet.
A spreadsheet package contains electronic equivalent of a pen,
an eraser and large sheet of paper with vertical and horizontal lines to
give rows and columns. The cursor position uniquely shown in dark
mode indicates where the pen is currently pointing. We can enter text
or numbers at any position on the worksheet. We can enter a formula
in a cell where we want to perform a calculation and results are to be
displayed. A powerful recalculation facility jumps into action each time
we update the cell contents with new data.