What are Guitar string names?

From highest-pitched string (1) to lowest-pitched string (6):

1. The first string, also called the "high E" or "E1".

2. The second string, also called the "B" or "B2".

3. The third string, also called the "G" or "G3".

4. The fourth string, also called the "D" or "D4".

5. The fifth string, also called the "A" or "A5".

6. The sixth string, also called the "low E" or "E6".