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 rain shadow effect, when mountain ranges intercept moisture-laden air masses, forcing them higher where their moisture condenses and falls as rain or snow. The downwind side of such ranges are usually much drier than the upwind side.