c_keywords.c

Here’s the updated C code with added documentation and an explanation:

#include <stdio.h>

/**
 * @brief The main function demonstrates the use of the 'auto' keyword in C.
 * 
 * This function initializes an integer variable with the 'auto' storage class specifier
 * and prints its value. The 'auto' keyword is used to define automatic variables, which 
 * are the default storage class for local variables.
 * 
 * @return int Returns 0 to indicate successful execution.
 */
int main() {
    int autoVar = 10;  /**< Integer variable initialized to 10. The 'auto' keyword is implied here. */

    // Print the value of the variable
    printf("Value of autoVar: %d\n", autoVar);

    return 0;   /**< Return 0 to indicate successful execution. */
}

Explanation

1. Variable Initialization:

   • int autoVar = 10; declares an integer variable autoVar and initializes it with the value 10. The auto keyword is optional and implied for local variables in C, so it is not explicitly necessary here.

2. Printing the Variable:

   • printf("Value of autoVar: %d\n", autoVar); prints the value of the autoVar variable. The %d format specifier is used for printing integer values in C.

3. Return Statement:

   • return 0; indicates that the program has executed successfully. The value 0 is returned to the operating system.