The answer to the question presented above would be 'equal temperament'. The concept of equal temperament divide the octave into 12 tones. This helps avoid the harmonies to be deemed unpleasant when the music is played.
Answer:
For example, you could move all of the notes of the leitmotif up three semitones, or up four notes in that scale, or by a pitch interval of two. The point is that every note is changed in the same way, so the relationship between them is the same. The basic melody is still there, but it sounds different.
Explanation:
Answer: By intending the statements in the body of the loop you visually set them apart from the surrounding code. This makes your program easier to read and debug. Also, this is similar to the style that most programmers follow when writing loops.