# Integral

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**Integral** can refer to one of several closely related concepts from calculus.

- The indefinite integral, which is a family of functions formed by adding an arbitrary constant to an antiderivative.
- The definite integral, which gives the area under a curve between two points.
- The line integral, an integral under a curve, taken over a scalar or a vector field.
- The flux integral, which measures the amount of flow through a given surface in a vector field.