| Package | Description | 
|---|---|
| org.apache.poi.ss.formula.eval | |
| org.apache.poi.ss.formula.functions | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | RelationalOperationEvalBase class for all comparison operator evaluators | 
| class  | TwoOperandNumericOperation | 
| class  | UnaryMinusEval | 
| class  | UnaryPlusEval | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | BooleanFunctionHere are the general rules concerning Boolean functions:
 
  Blanks are ignored (not either true or false) 
  Strings are ignored if part of an area ref or cell ref, otherwise they must be 'true' or 'false'
  Numbers: 0 is false. | 
| class  | IfFuncImplementation for the Excel function IF | 
| class  | LogicalFunctionImplementation of the various ISxxx Logical Functions, which
  take a single expression argument, and return True or False. | 
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