What are the formal and informal qualifications to be president?

The formal and informal qualifications to be president:

The answer is that the qualifications for a candidate who wants to become the president of the United States of America should be born in the United States of America which makes him a natural born citizen of the country.

His age should be at least thirty five years and he should be residing in the United States for at least fourteen years before he takes an oath in the office of the President of the United States of America.