What are the differences between normal variable and static variable in function concept?

Answer 1

I just try to give you an example.

void foo(int y)
{
int x = y;
}

When a block of program ie function ends the memory is automatically deallocated by compiler & that's why the variable x has no existence in our program.

But for static variable, the memory is not deallocated until the entire program ie main() ends.

Answer 2

Normal variables are destroyed at the end of the function, because they are allocated on the stack.
Static variables aren't. They always exists, even after function call.

Answer 3

Bibhash Ghosh It turned out that the question was posted a year ago. I perfectly understood the concept. Thanks sir.

Answer 4

Yeah I have noticed that after committing. Glad it helps.