Some facts about static variable

IN C STATIC VARIABLE CAN BE INITIALIZED USING ONLY CONSTANT LITERALS.........

FOR EXAMPLE :  


static int i=20;
 

 IF WE DO NOT INITIALIZE ANY VALUE THEN......



 FOR EXAMPLE : 

static int i;

then by default value of i will be ZERO.......
MEANS i will be 0  ......

Note: All objects with static storage duration must be initialized   before execution of main() starts......

 FOR EXAMPLE : 

BELLOW PROGRAM WILL GIVE COMPILE TIME ERROR...


#include<stdio.h>
int a( )
{
return 6;
}
main( )
{
static int i=a( );       /* Compile Time Error*/
printf("%d",i);
return 0;
}

Explanation: All objects with static storage duration must be initialized   before execution of main() starts......