The C chord is made up of the notes C, E, and G. The Cm chord is made up of the notes C, Eb, and G. The difference between these two chords is the note Eb. This note is called a flatted third, and it is what gives the Cm chord its minor sound.
C and Cm are both common chords that are used in a variety of genres of music. The C chord is often used in pop, rock, and country music, while the Cm chord is often used in blues, jazz, and folk music.
Here are some examples of songs that use the C chord:
* "Happy Birthday to You"
* "Twinkle, Twinkle, Little Star"
* "The Star-Spangled Banner"
Here are some examples of songs that use the Cm chord:
* "Yesterday" by The Beatles
* "Hallelujah" by Leonard Cohen
* "What a Wonderful World" by Louis Armstrong