Answer:
Before John F. Kennedy became the 35th President of the United States, he had other jobs. He was a part of the U.S Naval Reserve for about 4/5 years (from 1941 to 1945). He was in the House of Representatives for 6 years(from 1947 to 1953) and he was a Senator for about 7 years (from 1953 to 1960).