Dr. Jekyll and Mr. Hyde (character)

Dr. Henry Jekyll feels he is battling between the good and bad within himself, thus leading to the struggle with his alter ego, Edward Hyde. He spends his life trying to repress evil urges that are not fitting for a man of his stature. He develops a serum in an attempt to mask this hidden evil. However, in doing so, Jekyll transforms into Hyde, a hideous creature without compassion or remorse. Jekyll has a friendly personality, but as Hyde, he becomes mysterious and violent. As time goes by, Hyde grows in power and eventually manifests whenever Jekyll shows signs of physical or moral weakness, no longer needing the serum to be released.

Question: are dr jekyll and mr hyde the same person
Answer: yes