In mathematics, "X = 0" indicates that the variable X has a value of zero. This means that there is no quantity or amount represented by X. Zero is a unique number that serves as the additive identity, meaning that adding zero to any number does not change its value. Zero plays a crucial role in various fields, including algebra, calculus, and computer science. It is essential for defining concepts such as limits and functions. Additionally, in the context of coordinates, a point at (0,0) represents the origin in a two-dimensional space, serving as a reference for all other points.