A composer may write music and lyrics, or instrumental music alone.
Some composers perform their own music, while others make a career of writing songs for other people to perform.
Composers may write out their compositions by hand, while many present-day composers use composing software to record their works. Well-known computer composing programs include Finale and Sibelius.
Some composers practice their craft on a very casual, elementary level. In order to become a more advanced composer, though, you need a thorough understanding of music theory (such as notes, chords, progressions) as well as the properties and capabilities of a wide variety of instruments (brass, string, percussion and woodwind families).
Young people who wish to be composers should get involved in school music programs, such as chorus, band and ensembles. Learn to play at least one instrument well, and become exposed to as many instruments as possible.
College courses that can assist students in developing their composing skills include music theory, music history, and instrument and vocal technique courses. While most universities offer these types of courses, schools such as Boston Conservatory and the Eastman School of music are two of the most prestigious schools offering degrees in composition.