=B3*C3*2
the asterisk is used for what function when building a formula in excel
If you mean in Excel, yes: you must always start a formula with an equal sign.
Click on the cell to view the formula in the formula bar at the top of the screen. If you would like to display the formula as text in a cell, instead of seeing the results of the formula, enter an apostrophe (') in front of the equal sign (=) of the formula. That will tell Excel to display the cell contents as text and not try to calculate the formula. To display all formulas at once, press and hold the Ctrl key and then press the ` key, which is in the top corner of your keyboard. There is also an option in the View menu to display formulas.
an equal sign =
An equal sign because in order for the formula to go through correctly it has to have an (=)
The combined sign has no special meaning. Any formula in Excel starts with an equal sign. To refer to a cell, you can write, for example, =A1. This can also be written as =+A1. The "+" isn't really necessary in this case. Most likely, a user started the formula with a "+" (out of old habit, since that's what people used to do in older spreadsheet programs), and Excel added the equal sign, which is required in Excel, automatically.
Every formula starts with equal sign =If you want to display list of all functions in Excel from the upper toolbar select: Insert - Function.
an equal sign =
Every formula, equation, or function starts with a equal sign in a given cell.
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The first key you type in Excel to create any kind of formula is the equal sign (=). If you are trying to create an array formula press CTRL+SHIFT+ENTER. Excel surrounds the formula with braces ({ }) and places an instance of the formula in each cell of the selected range.
The equal sign in Excel is used to start a formula. All formulas begin with the equals sign. It can also be used for comparing things. In the following example, the first equals sign is starting the formula and the second one is comparing cell A2 and B2: =A2=B2