digit
The word 'guarismo' in Spanish refers to any numerical digit. It is a term primarily used in Spain and is not often utilized outside the region. The word is equivalent to 'numeral' or 'digit' in English.
The telephone number has nine digits.
This phrase refers to a modern phone number which typically has nine digits. 'Guarismo' is used to denote each individual numeral in the phone number.
The main digit of pi is 3.
This phrase refers to the mathematical constant pi (π). The 'main digit' or guarismo principal refers to the first digit of the number, which in the case of pi, is 3.
In the decimal system, every digit has its place.
This phrase describes the decimal numeral system, a way of expressing numbers that employs 10 as the base and uses the digits from 0 through 9. Each 'digit' or 'guarismo' refers to one of these numbers and has a specific place value.