> In Australia we usually have to pick our major before we finish high school. On paper. In practice, it's not very hard to begin one degree but then switch to

> In Australia we usually have to pick our major before we finish high school. On paper. In practice, it's not very hard to begin one degree but then switch to another. > I start a degree in Computer Science, in most of my classes all my peers are also CS students It depends. In our CS degree, you stand a very good chance of meeting (at least virtually) students from other disciplines, degrees, and backgrounds in some subject - from the statistics, not just in mathematics classes but also in Python classes and anything that looks like data science. It does depend on how your degree and how their degree was designed, however - some disciplines prescribe the entire programme while others make more space for including subjects from other fields.