Who was President in the 1940s and 1950s?

There were three presidents during these decades. Franklin D. Roosevelt was president from March 4, 1933, to April 12, 1945. Harry Truman took office in April 12, 1945 and served until January 20, 1953. Dwight D. Eisenhower was sworn in on January 20, 1953 and was president until January 20, 1961.