Class, ID

Question

What is diffrens betwen class and ID?

Answer 1

Classes are NOT unique. You can use the same class on multiple elements. You can use multiple classes on the same element.a class selector is a name preceded by a full stop (“.”) and an ID selector is a name preceded by a hash character (“#”). The difference between an ID and a class is that an ID can be used to identify one element, whereas a class can be used to identify more than one.
for more information
https://www.quora.com/What-is-the-difference-between-class-and-id-in-HTML

Answer 2

So i can use more then one class etc. <h1 class=".green" ".red"> but i can use only one id etc. <h1 id="#green"> and class can have in it color and position of green but id can only have color or only position.Am i right?