C – Automatic Storage Classes

Automatic Storage classes:

1. Keyword: auto
2. Memory location: Inside the RAM
3. Default value: Garbage Value
4. Scope: Belongs to Block in which it has defined.

Note: auto variables must be local. If we don’t give storage class to local variable, it is auto default.

#include<stdio.h> int main() {             auto int a=10;             {                         auto int a;                         printf(“In block : %d \n”, a);                 }             printf(“In main : %d \n”, a);                  return 0; }

We cannot define auto variables globally:

#include<stdio.h> auto int a=30;   /* Error :  */ int main() {             auto int a=10;             printf(“In main : %d \n”, a);                  return 0; }