Series 8

import java.util.*;

 class Series10
 {
public static void main(String args[])
throws InputMismatchException{
Scanner scan=new Scanner(System.in);

System.out.println("Enter the limit: ");
int n = scan.nextInt();

int i, a=0, s=0;

for(i=1;i <= n; i++){

    a = a*10 + 1; //generates 1, 11, 111, ... 
    s = s + a; 
}

System.out.println("Sum = "+s);

}//end of main
}//end of class