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View this topic on docs.devexpress.com (Learn more) ## FormulasA spreadsheet formula is an equation that performs a calculation on the numbers, functions and values of one or more cells. A formula is associated with a cell or a cell range. It is accessed using the Range.Formula property. ## Formula Types
## Formula Syntax
A formula is a string expression that begins with an equal (=) sign. A formula can contain the constants, operators, cell references, calls to functions, and names. Consider the following formula, which calculates the mass of a sphere.
- “4” and “3” are
**numeric constants**. Although they are written as integers, the division operator (/) interprets them as being real numbers, i.e., 4.0 and 3.0. As a result, the calculation produces a precise result that is not rounded to an integer. - “/” is the division operator.
- “PI()” results in a call to the PI function, which returns the value of p.
- “A2” is a cell reference, which returns the value within that specific cell.
- “3” is a
**numeric constant**. - “^” is the caret
**operator**, which raises the left operand to the power of the right operand. **Parentheses**are used for grouping and changing the operator precedence.- “
*” is the asterisk (*)**operator**, which performs multiplication. - The
**Density**is a defined name within the worksheet that can represent a cell range, a function or a constant.
The formula is calculated from left to right, according to the operator precedence. To change the order of calculation you can enclose a portion of the formula in parentheses. ## Parts of a Formula## Calculation
To recalculate all formulas in a workbook, call the IWorkbook.Calculate method. The DocumentSettings.Calculation property provides access to calculation options. Calculation results are placed in the Range.Value property of corresponding cells. You can also calculate a formula and leave the document unchanged by using the IWorkbook.Evaluate method. ## Formula Engine
The FormulaEngine is an object that provides the capability to calculate and parse worksheet formulas. It includes a built-in formula parser, as well as the flexibility to evaluate formulas in any range of any worksheet. See the Formula Engine topic for more information. ## See Also |