AnimationController

This class lets you perform tasks such as:

• Play an animation forward or in reverse, or stop an animation.
• Set the animation to a specific value.
• Define the upperBound and lowerBound values of an animation.
• Create a fling animation effect using a physics simulation.

By default, an AnimationController linearly produces values that range from 0.0 to 1.0, during a given duration.

Learn more from the following links:

• AnimationController - Flutter
• AnimationController class