What is phi meaning?

Phi (φ) is a mathematical constant that represents the golden ratio or divine proportion. It is approximately equal to 1.6180339887... and is derived by dividing a line into two segments in such a way that the ratio of the smaller segment to the larger segment is equal to the ratio of the larger segment to the whole line. This ratio has been found in nature, art, and architecture and is believed to have aesthetic appeal and harmonious qualities. Phi is also found in various mathematical equations and is used in various fields such as finance, science, and design.