Java mini scopes inside methods

public class MainClassInternalScopeInsideMethod {
    public static void main(String[] args) {
        int a = 10;
        // This is internal scope inside method
        {
            // We can have same naming for variables inside scope
            // Also inside this scope we can use method variables like "a"
            int b = 10;
            int res = a + b;
            System.out.println("First scope here b is 10: a + b = " + res );
        }

        // This is another internal scope inside method
        {
            int b = 40;
            int res = a - b;
            System.out.println("Second scope here b is 40: a - b = " + res );
        }
    }
}