Three presidents served only one full term but were elected to second terms which they could not complete . - Abraham Lincoln and William McKinley served only a few weeks or months of their second terms before being assassinated, and Richard M Nixon, resigned 19 months into his second term.
Five Presidents - William H Harrison, Zachary Taylor, James A. Garfield, Warren G Harding, and John F. Kennedy - died during their first terms and so had no opportunity to seek a second.
Five Presidents - John Tyler, Millard Fillmore, Andrew Johnson, Chester A. Arthur, and Gerald Ford - succeeded from the Vice-Presidency but did not win elected terms of their own and so actually served less than one term.
That gives 29 Presidents who were "single-termers" by one definition or another.
Of those 29 U. S. Presidents, the following ten were candidates in more than one presidential election but won only once:
John Adams (won in 1796; lost in 1800)
John Quincy Adams (won in 1824; lost in 1828)
Martin Van Buren (won in 1836; lost in 1840 and 1848)
William Henry Harrison (lost in 1836; won in 1840; see 3rd note above)
Benjamin Harrison (won in 1888; lost in 1892)
Theodore Roosevelt (won in 1904; lost in 1912; see 1st note above)
William Howard Taft (won in 1908; lost in 1912)
Herbert Hoover (won in 1928; lost in 1932)
Jimmy Carter (won in 1976; lost in 1980)
George H. W. Bush (won in 1988; lost in 1992)
In 1856, incumbent President Franklin Pierce sought but failed to win the Democratic Party nomination, which went to James Buchanan.
George Washington is the president that appointed the most Supreme Court Justices. There have been only seven US Presidents that served only one term.
find a counterexample to the statement all us presidents have served only one term to show statement is false
John Adams is one of them.
Only one and that was Franklin Roosevelt.
27 of the 44 US presidents served more than one term in office. 19 of these were elected to more than one term in office. The other 8 served out the term of a president who died in office and were re-elected for a second full term. Only one president served more than two terms, Franklin D Roosevelt, who served three full terms and was elected for a fourth but died in office before finishing that term.
William Henry Harrison and James Garfield both died before they finished one year as President.
Only four terms? That's the most any one president has served. Franklin Delano Roosevelt served three terms, starting in 1933, and died during his fourth term in 1945. Every other President has only served one or two terms.
Some Presidents served more than one term.
Assuming you mean the 1970's, Jimmy Carter was the only Democrat--of course, there were only three presidents in the decade. Carter was inaugurated in 1977 and was president one term, until 1981.
There were 40 presidents from 1789 to 1990. (Grover Cleveland served twice, I count him one; counting this way, George Bush was the 40th, who had started his term 1989.)
Several presidents have served only one term.. John Adams, John Quincy Adams, Van Buren, Polk, Pierce, Buchanan, Hayes, B. Harrison, Taft, Hoover, Carter, Bush Sr.
James K. Polk and Rutherford B. Hayes both declined to run for a second term.