What does "static" mean in C?

Question

I've seen the word `static` used in different places in C code; is this like a static function/class in C# (where the implementation is shared across objects)?

Answer 1

Static simply means the scope of the variable is within that block or file e.g.

static int xyz;

<Contents of file test.c>

"xyz" is only visible in file test.c

void func1 ()

{

static int xyz;

...

}

In the second case, "xyz" is only visible in function "func1"