0 Automatic Storage Class in C

The features of a variable defined to have an automatic storage class are as follows :
An automatic variable is declared by using keyword  auto.
Syntax : auto type var-name;

Storage                                   :               Computer Memory
Scope                                     :                Local to the block in which variable is defined
Default Initial Value              :                Garbage Value
Lifetime                                 :               Till the control remains within the block in which   variable    is defined

Example:
#include<stdio.h>
int main()
 {
   auto int num=6;
    {  
      printf(" %d",num);
    }
    printf("\n %d",num);
    return 0;
   }
Output:
6
6

Note: If no storage class is specified, by default it is auto.