C Auto Storage Class

What Is Auto Storage Class?

• All variables declared inside a function without any storage classes keyword is considered as auto storage class by default.
• In auto storage class a memory is allocated automatically to the variables when the function is called and deallocates automatically when the function exits.
• Variables under auto storage classes are local to the block or function. So, it is also called as local variables.
• The keyword auto is rarely used because all uninitialized variables are said to have auto storage classes.

Syntax - Auto Storage Class

auto int m1;

C program - Auto Storage Class

#include <stdio.h>
int main()
{
//declaration of automatic variables within main function
auto int m1 = 5;     //declaration of automatic variable with the keyword auto
int m2 = 10;      //declaration of automatic variable without the keyword auto
printf("The value of m1 : %d ", m1);
printf("\nThe value of m2 : %d ", m2);
return 0;
}

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