Breif description about static storage class

The static storage class is very important in C language so i'm going to discuss it in brief 

just have a glance below and i have compared it with an example::

The features of static storage class are as following:

Storage	Memory
Keyword	static
Default initial value	Zero
Scope	Local to the block, in which the variable is defined
Life	Value of the variable persists between different function calls.

#include<stdio.h>

void add();

int main()

{

add();

add();

add();

add();

return 0;

}

void add()

{

 static int i=1;

 printf("\n%d",i);

 i=i+1;

}

OUTPUT : 1 2 3

 static variable do not disappear when the function is no longer active. There value persist. If control comes back to the same function again , the static variables have the same values they had last time around.

Note:

if the storage class is static, then the statement static int i = 1 is executed only once, irrespective of how many times the same function is called.