Use the isdigit method to see if a character is a numeric digit character.
A positional numeral system uses a single symbol, a numerical digit, to represent numbers. It is frequently abbreviated to "only digit." Examples are "2" and "25." The word "digit" derives from the fact that the ten fingers (Latin: digiti) on each hand correspond to the ten symbols of the conventional base-ten numeric system, or decimal (Old Latin: decem, meaning "ten") digits.
The absolute value of the base determines the required numerical digit for a given numeral system with an integer basis. For instance, the base-10 decimal system requires ten digits (0 through 9), whereas the base-2 binary system only needs two digits (0 and 1).
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The answer is C represent members in negotiations
All vessels are divided into two categories:
stand on vessels: these are those that have the privilege to maintain their course and speed when operating near another vessel.
Give way vessel: these are those vessels that are mandated to keep away from stand on vessels when the two are near each other.
When two boats are operating near each other, the STAND ON VESSEL must maintain its course and speed while the give way vessel must take precautions and early actions to keep out of the way of the stand on vessel.
