14.12.1  The abscissa of a three-dimensional point: abscissa

See Section 13.13.2 for abscissas in two-dimensional geometry.

The abscissa command finds the abscissa (x-coordinate) of a point.

• abscissa takes one argument:
  P, a point.
• abscissa(P) returns the abscissa of P.

Example.
Input:

Output: