The major scale is one of the most commonly used musical scales, especially in Western music. It is one of the diatonic scales. Like many musical scales it is made up of seven notes: the eighth duplicates the first at double its frequency so that it is called a higher octave of the same note (from Latin "octavus", the eighth).
The characteristics that give the major scale its specific flavor are found in the sequence (or pattern) of whole steps (WS) and half steps (HS) that form the scale.
The pattern of the major scale is: WS - WS - HS - WS - WS - WS - HS