L04 - Iteration Lab - Part 2 - The Three Loops

Enter the following program and fill in the missing pieces so that the three different styles of loops compute the sum of numbers.

public class Loops {
  public static void main(String[] args) { 
    //sum the numbers from 1 to 5 using a for loop 
    int sum = __________; 
    for(_________;_________;_________) { 
      sum = sum + i;
    } 
    System.out.println("The sum of the numbers from 1 to 5 is " + sum);
     
    //sum the numbers from 1 to 10 using a while loop
    sum = 0;
    int i = 0;
    while (__________) {
      i = __________;
      sum = sum + i; 
    }
    System.out.println("The sum of the numbers from 1 to 10 is " + sum); 
    
    //sum the numbers from 1 to 15 using a do...while loop
    sum = 0; 
    i = 0; 
    do { 
      i = __________; 
      sum = sum + i;
    } while (__________);
    System.out.println("The sum of the numbers from 1 to 15 is " + sum); 
  } 
} 

You can check your results by using the formula 1 + 2 + ... + n = n(n+1)/2

Sample Output

The sum of the numbers from 1 to 5 is 15
The sum of the numbers from 1 to 10 is 55
The sum of the numbers from 1 to 15 is 120