According to a Stack Overflow Developer Survey:

Two out of three developers are self-taught - Many developers don’t have computer science degrees.

Self-taught developers dominate technology: 69% of the developers who responded to the survey are at least partly self-taught, and fewer than half hold a formal degree in computer science. In a trend spreading to other fields, many are choosing ways to learn that offer everything but a degree: online courses, bootcamps, on-the job training, and collaborating with peers.