Const in Copy Constructor

Question

What is the purpose of having const in copy constructor like

Test(const Test& obj) What is the purpose of this const and what if i remove this const, will it work properly or not).
What other reason of having const except accodently not been modify inside copy constructor function.

Answer 1

~ swim ~ Yeah i did i got error but i jist wanted to know the reason....bcz someone asked me this question and they is other reasons also to have const and i was not getting thats why posted

Answer 2

Thanks ~ swim ~