The term digit is often used to represent a number in a specific position in a larger number, or in a number with a fraction expressed using a radix point.
The precipitation of the Andes Mountain climate changes but not drastically between two places. In Colombia there is a lot of rainfall all year round. In Ecuador there is the desert climate without much rainfall. Peru is simalar to Ecuador.
The prevailing view is that the Andes became a mountain range between ten to six million years ago when a huge volume of rock dropped off the base of Earth's crust in response to over-thickening of the crust in this region.