A digit in a number that is not equal to zero is called a “nonzero digit.” A digit is a symbol that stands for a number from 0 to 9, so any number from 1 to 9 is a nonzero digit.
Combinations of digit values are used to make representations of larger numbers. For example, the digits 5 and 0 can each stand for the integers 5 and 0, or they can be used together to stand for the number 50.
The West Arabic system is where European numbers, which are mostly used in Western countries, came from. Most major languages, like formal Chinese, Assamese Bengali, and Ethiopian Ge’ez, have their own number systems.