## Built-in functions

The Functions panel in the Formula Editor lists all the built-in functions JReport provides. They are powerful and commonly used. If you are still puzzled in finding your own required function, you can write user defined formula functions. For details, see User-defined formula functions (UDF).

The following are types of the built-in functions:

- Math
- String
- Date/Time
- Date Range
- Financial
- Array
- Others