The easiest way to enter functions is to use the function selector.
Click on the cell in which you want to use the function.
Click on the Function button on the toolbar to the left of the formula line. The function menu will appear.
Click on All... for the full list of functions or Quick... for a shorter list of commonly used functions. A list of functions will appear. Each function is followed by its parameters which are described to help you enter the right kind of data.
Scroll through the list if necessary. As you move from function to function the status line will give you information on each function. Double-click on the function you want. You can reach a function more quickly by typing in the first letter of its name.
The function will appear on the formula line followed by a set of brackets and text describing the parameters needed. Further details of the function will be shown as text in the status line.
Enter the parameters required. You will see that as you move from parameter to parameter, the parameter description is selected. You can type over this or click on cells to insert cell references. When you have finished, click the Tick button to enter your formula. The result will be displayed in the cell, and whenever you select the cell you will see the formula on the formula line.
If for any reason the formula you created does not produce a sensible result, or Fireworkz can not interpret your formula, the word Error will appear in the cell, and the status line will describe the error.