Why " j " is not incremented in the following c code? Any reference for auto keyword in c ?

Question

main ()
{
void fun ()
fun( );
fun( );
}
void fun ()
{
static inti = 1;
auto intj = 5;
printf ("%d", (i++);
printf("%d",(j++);
}

The output of the code is :- 1525

Answer 1

It is because a static variable is declared once and retains it's value between function calls whereas the auto variable doesn't do the same and are re-declared everytime the function is called.