The term "PI_VALUE" typically refers to the mathematical constant π, which represents the ratio of a circle's circumference to its diameter. This value is approximately 3.14159 and is an irrational number, meaning it cannot be expressed as a simple fraction. π is widely used in various fields, including mathematics, physics, and engineering, particularly in calculations involving circles and circular shapes. In addition to its mathematical significance, π has cultural importance and is celebrated annually on Pi Day, which falls on March 14th (3/14). The constant has fascinated mathematicians for centuries, leading to numerous studies and approximations, as well as its appearance in various formulas across different scientific disciplines.