π (Pi) is a mathematical constant that represents the ratio of the circumference of a circle to its diameter, approximately equal to 3.14159. It is an irrational number, meaning it cannot be expressed as a simple fraction, and its decimal representation goes on infinitely without repeating. In the context of continuous distributions, π appears in various formulas and calculations, particularly in normal and exponential distributions, where it plays a crucial role in defining probabilities and density functions.
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