scholar[0].setID(1234); correctly assigns an ID number to the first Student scholar.
The governments of many nations use a national identification (ID) number, national identity number, national insurance number, or JMBG/EMBG as a way to track their citizens, permanent residents, and temporary residents for the purposes of work, taxation, government benefits, health care, and other functions related to government.
Different nations have different methods for implementing such a system, but in most cases, when a citizen reaches legal age or is born, they are given an identification number. Such numbers may be given to non-citizens upon entry into the nation or upon issuance of a permit for temporary or indefinite residence.
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