Question

write a java code program using loops to compute the sum of the 30 terms of the series below.

Find sum of all integers between 100 and 200 which are divisible by 9 or 13 Write a program to find the sum of the first 8 terms of the series 1 + 11 + 111 + 1111 + . . .

Output:

Term Ratio Sum

Answer 1

1)

Java code:

public class Main
{
   public static void main(String[] args) {
        //initializing sum as 0
        int sum=0;
        //looping from 100 to 200
        for(int i=100;i<=200;i++)
        //checking if number is divisible by 9 or 13
            if(i%9==0 || i%13==0)
            //adding it to sum
                sum+=i;
        //printing Sum
        System.out.println("Sum="+sum);
   }
}

Screenshot:

Output:

2)

Java code:

public class Main
{
   public static void main(String[] args) {
        //initializing sum as 0 and num as 0
        int sum=0,num=0;
        //looping for 8 times
        for(int i=0;i<8;i++){
           //finding current term
           num=num*10+1;
           //adding it to sum
           sum=sum+num;
        }
        //printing Sum
        System.out.println("Sum="+sum);
   }
}

Screenshot:

Output: