Entering data is as simple as selecting a particular cell and typing input from the keyboard. Just follow these steps:
This approach works for all types of data, with the exception of formulas. Entering a formula is almost this simple, except that you must enter an equal sign (=) first. Just go to the cell, press the = key on your keyboard, and then enter the formula.
As to how the individual data is formattedthat is, how Google Spreadsheets interprets numbers and lettersit depends on what type of data you enter: