there have been six presidents of the united states.
how many presidents of the united states has there been?
six
list of presidents of the united states by military rank





















































the united states constitution names the president of the united states the commander-in-chief of the united states armed forces. many presidents, however, also served in the military before taking office; all but 13 of the 44 men to become president as of 2019 have served.
list of presidents of the united states by military rank
list of autobiographies by presidents of the united states





















































many presidents of the united states have written autobiographies about their presidencies and/or (some periods of) their life before their time in office. some 19th-century u.s. presidents who wrote autobiographies are james buchanan and ulysses s. grant, though grant's autobiography is about his time as general during the u.s. civil war and not about his presidency. some of the more recent u.s. presidential autobiographies, such as bill clinton's, george w. bush's, and barack obama's (written and published before he was elected president) sold well enough to earn them millions of dollars.
list of autobiographies by presidents of the united states