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C major is the only major key with no sharps or flats in its key signature. Because of its simplicity, it is often the first key students learn and serves as the foundation for understanding scales, chords and harmony.
What is C major?
The C major scale consists of the notes C, D, E, F, G, A and B. Its relative minor is A minor, which shares the same key signature.
Since C major uses only the white keys on the piano, it is commonly used to introduce music theory, intervals, chord construction and basic keyboard technique.
How is C major used in piano playing?
C major is usually the first key in which piano players learn scales, chords and simple songs. It also introduces the three primary chords: C major (I), F major (IV) and G major (V), which form the basis of countless chord progressions in popular music.
Although many songs are transposed into other keys to suit singers or instruments, C major remains one of the most important keys for learning piano and understanding modern harmony.