Question

Write a for loop that computes the following sum: 5+10+15+20+...+485+490+495+500. The sum should be placed in a variable sum that has already been declared and initialized to 0. In addition, there is another variable, num that has also been declared. You must not use any other variables.

Answer 1

Answer:

public class num9 {

   public static void main(String[] args) {

       int sum =0;

       int num =5;

       for(num =5; num<=500; num+=5){

           System.out.println(num);

           sum +=num;

       }

       System.out.println(sum);

   }

}

Explanation:

• Declare and initialize the variables sum and num
• Use a for loop with the condition for(num =5; num<=500; num+=5) Since the loop will increment by 5 and run from 5 to 500
• Within the loop, add num to sum at each iteration
• Print all elements on seperate lines
• Outside the loop, print the final value of sum

Create a for loop