In the bible Why is there John and then John 1 2 and 3?

In The Bible, "John" typically refers to the Gospel of John, while "1 John," "2 John," and "3 John" are three separate epistles (letters) attributed to the same author, traditionally believed to be John the Apostle. The Gospel focuses on the life and teachings of Jesus, while the epistles address specific issues within early Christian communities, such as love, truth, and the nature of Jesus. Each letter serves a distinct purpose, providing guidance and encouragement to believers.