They are called rows and rows are numbered.
This question is not clear. It could be a page break. You also could be referring to a row, as a horizontal element of a spreadsheet.
They are called Rows.
Columns.
columns
column
A column is the vertical component (up-down) of a spreadsheet.
Vertical blocks are called columns.
The vertical axis is the columns in a spreadsheet.
They can be called fields, but that is more the case in a database than in a spreadsheet.
columns
Columns are vertical in a spreadsheet.
Columns
The / is used for division in spreadsheet formulas.
A row is a horizontal line of cells in a spreadsheet or table. A column is a vertical line of cells in a spreadsheet or table.
Columns are vertical, rows are horizontal.
spreadsheet