Question

Write a program to calculate and print the sum of odd numbers and the sum of even numbers for the first natural numbers.
The integer n is to be entered by the user.

Answer 1

main ( )
{
int x;
printf ("enter x value");
scanf (" %d",&x);
if (x%2==0)
printf ("the number is even");
else
printf ("the number is odd");
}

Answer 2

Question:

Write a program to calculate and print the sum of odd numbers and the sum of even numbers for the first n natural numbers. The integer n is to be entered by the user.

Solution:

Language used : Java

import java.util.*;

public class OddEven

{

static void main()

{

Scanner sc=new Scanner(System.in);

int i,n,s1=0,s2=0;

System.out.println("Enter a number:");

n=sc.nextInt();

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

{

if(i%2==0)

s1=s1+i;

else

s2=s2+i;

}

System.out.println("Sum of even numbers="+s1);

System.out.println("Sum of odd numbers="+s2);

}

}