I am just starting to learn about vectors and I have question regarding vectors and their parallel properties: Assume that we have two vectors A and B, and they are said to be parallel. We know that in order to be parallel the angle between the two vectors either have to be 0 or 180. However, after consulting StackOverFlow, I am told that "Two vectors are parallel if they have the same direction". Thus, eliminating the fact that the angle between the vectors can't be 180. So my question is, can someone verify the statement, if two vectors are in the same direction then they are parallel and have an angle of 0.