How is int is a structure in c#?

Answer 1

When you want to make a new int variable,
you simply declare it thru this:
int num = value;

And not thru this:
int num = new int(value);

That way of making an instance of an object is one of the characteristics of a structure, thus making the "int" a "struct"

Answer 2

Int also have methods however because it is a struct you have no field variables and cannot inherit from it..

Answer 3

int variable name;