Question

design a program using a while loop that displays the odd numbers from 1 to 30. Display the sum of all odd numbers at the end.

Answer 1

I am Creating C++ Program

#include<iostream>
using namespace std;

int main()
{
   int sum=0; // Declare Integer variable sum=0
   int i=1; // Declare Integer variable i=1
  
   while(i<=30) // Create while loop until 30
   {
       cout<<i<<" "; // display odd numbers i
       sum+=i; // calculate sum of odd numbers
       i+=2; // increment i value by 2
   }
   cout<<"\nSum of Odd Numbers: "<<sum; // display sum of odd numbers
}

OUTPUT:

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29
Sum of Odd Numbers: 225

I am Creating JAVA Program

class DisplayOdd // Create Main class DisplayOdd
{
public static void main(String [] args)
{
int i=1; // Declare Integer variable i=1
int sum=0; // Declare Integer vairable sum=0

while(i<=30) // Create while loop until 30 elements
{
System.out.print(i+" "); // display i value
sum+=i; // calculate sum of odd numbers i
i+=2; // increment i by 2
}
System.out.println("\nSum of Odd Numbers: "+sum); // display sum of odd numbers
}
}

OUTPUT

F:\>javac DisplayOdd.java

F:\>java DisplayOdd
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29
Sum of Odd Numbers: 225