What are the operators | (union), & (intersection), - (difference) and ^ (symmetric difference) in maths?

Question

Are they logical operators and/or only work with sets? Thanks!

Answer 1

I read a chapter in mathematics a long back during my schools. it's called Venn diagram or set diagram. I saw these concepts of union, intersection, exceptions (A'), and much more concepts. but honestly I forget them all. now I python reminds me those topics
:-)

Answer 2

So these are all set operations. I thought these are partly boolian logic and set operations.
Ah, I always confuse these two. I can read on Wikipedia what the exact statements do. Thanks for pointing out that these are described by Venn diagrams.