I am a newer to julia, and cannot understand the use of three dot although have read some documents.
For example as follows: A is two elements vector of (x,y); B is six elements vector of (1,2,3,4,5,6); C is four elements vector of (1,2,3, y) and D is four elements vector of (x,4,5,6).
How do I understand ...here?
Thank you very much for your help.

x, y = [1,2,3], [4,5,6]
A = [x, y]
B = [x..., y...]
C = [x..., y]
D = [x, y...]

Thank you, nilshg, I have known the meaning of splatting, it treat each element in the vector as a new, separate element. I was very curious about this example just now, and I couldn’t understand the instructions in the manual.