Program to convert number from base 10 to Celtics/Mayans base 20 number system
Our number system is called base 10 because we have ten digits: 0, 1, . . . , 9. Some cultures, including the Mayans and Celts, used a base 20 system. In one version of this system, the 20 digits are represented by the letters "A" through "T". Here is a table showing a few conversions: