How can you tell what the multiplicity of a class is for a UML diagram?

Question

For example, how can we tell if the relationship is 1-to-1 or 1-to-many.

Answer 1

I found this website that just shows the different types of ways to show it in the UML. These symbols will be shown on the ends of the arrows connecting the two classes.

https://www.uml-diagrams.org/multiplicity.html

Comments

Thank you! This website was very helpful!

Answer 2

Generally the line between the classes will be labelled (like when we have a star or numbers) to show which class has one or many instances of another class.