Major Scales

An excellent explanation: The Major Scale  (musictheory.net)

Theory Things   William Wieland

To write a major scale, write the major key signature followed by 8 successive pitches, beginning and ending with the name of the key. (The C major scale begins and ends with C.) The pattern of whole steps (W) and half steps (½) is 1 2 3 4 5 6 7 8 W W ½ W W W ½

C major scale