Block scope

 

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If the declarator or type specifier that declares the identifier appears inside a block or within the list of parameter declarations in a function definition, the identifier has block scope, which terminates at the end of the associated block.

So, placement of an identifier's declaration (in a declarator or type specifier) inside a block or within the list of parameter declarations in a function definition means that the identifier has block scope. Block scope of an identifier extends from the declaration to the end of the block in which the declaration appears.

Example

Identifiers a, b, and c have block scope.

Run this code

#include <stdio.h>
 
void f (int a)
{
    int b = 1;
    static int c = 2;
}   /* end of block associated with identifiers a,b,c */
 
 
int main(void)
{
    return 0;
}
/* end of this translation unit, end of file scope */

Possible output:

(none)