If you had formulas, you would be able to create spreadsheets using text editors. The formula is an arithmetic expression in which numbers, cell addresses, functions, symbols of arithmetic operations +, -, * and /. It starts with the formula = sign. The By symbol starts counting automatically in the cell when the program sees it.
To create skills in this regard, select an empty cell and enter = 10 + 5 in it, press Enter. The expression 15 (number) appears in the cell, and the formula itself appears in the formula bar. In formulas, along with numbers, you can also use the addresses of cells called signs. As you create formulas that contain references to cells, you link the formula to the cells in the book. The expression of a formula depends on the data available inside the cell, and it varies depending on how the data inside the cell changes.