Nokia 9210i User Manual page 202

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To enter data
To enter data, select a cell with the Arrows key and start typing the data in the
selected cell.
To confirm what you have entered into a cell, press Enter, OK, or go to another cell
with the Arrows key. To dismiss the action, press Esc or Cancel.
You can also enter a formula to perform operations on worksheet data. Sheet
application provides some predefined, or built-in, formulas, which are known as
functions.
To insert a function, press Insert function. A dialog opens. See Figure 78. The
function categories you can choose from are as follows: All, Financial, Date and time,
Mathematical, Statistical, Lookup, Text, Logical, and Information. Each category has a
set of functions, which you can see from the list next to Function name. Select the
function you want and press Close.
Figure 78
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