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title: Modules Overview | Juttle Language Reference
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# Modules

Juttle comes with built-in modules that provide functions for different data types, as well as the Juttle module for debugging needs:

   * [Array](../modules/array.md)
   * [Date](../modules/date.md)
   * [Duration](../modules/duration.md)
   * [Juttle](../modules/juttle.md)
   * [Math](../modules/math.md)
   * [Number](../modules/number.md)
   * [Object](../modules/object.md)
   * [String](../modules/string.md)

The constants and functions exported by these modules can be used in Juttle programs directly, without an import statement.