What is the purpose of a spreadsheet's formula vs a function?

• A. A function is a user-defined calculation; a formula is a predefined operation.
• B. Both are the same thing; no difference.
• C. A formula is used only for text; a function for numbers.
• D. A formula is a user-defined calculation; a function is a predefined operation.

Answer: (D)

The main idea is that a formula is a user-constructed calculation, while a function is a built-in operation provided by the spreadsheet program. A formula is created by you using operators and cell references to compute a result, so you decide exactly what math to perform, how the cells interact, and when it should run. A function, on the other hand, is a predefined operation with a specific purpose and rules for its arguments, such as SUM, AVERAGE, or IF. The software handles the underlying logic for that function, and you simply supply the inputs it needs. You can still mix them—your formula can include functions as parts of the calculation, like =A1 + SUM(B1:B5)—which shows how formulas and functions work together. So the correct idea is that a formula is user-defined, while a function is a predefined operation.