Particle used for direction, destination, means/transport, and "as" (role).

• Direction: 오른쪽으로 (to the right)
• Means: 버스로 (by bus)
• As: 학생으로 (as a student)

Use -로 after a vowel or ㄹ, and -으로 after other consonants: 집으로, 길로.