Harry Truman began his second term that year.
From the time Truman became president on April 12, 1945, there was no Vice President until January 20, 1949.
If you're asking how he came to be president, he was elected vice president, with John F. Kennedy in the 1960 presidential election. Johnson became the president when JFK was killed in Nov. 1963. Prior to that he was a a U.S. Congressman from 1937-1949, a U.S. Senator, from 1949-1961.
John Adams became president and Thomas Jefferson became Vice President.
After TR died, Taft became president. After FDR died, Truman became president.
Harry S. Truman was elected president in 1944. President Truman died in 1972 at the age of 88 in Kansas City, Missouri.
Gerald R. Ford became President.
Gerald Ford was elected to office as a U.S. Representative in 1949 at the age of 36. He was not elected to the office of Vice President. He was appointed after Spiro Agnew resigned. He was also not elected to the office of President, and became President after Richard Nixon resigned.
FRANCE
McKinley became President in March. The official day that he became President was March 4, 1897.
25 when he became a lawyer, 57 when he became president
Abraham Lincoln became President Lincoln.
He became president after Richard Milhous Nixon.