11C-Prog-13 Write a Algorithm and Program to calculate and print the sum of even integers of the first n natural numbers

13.   Write a Algorithm and Program to calculate and print the sum of even
integers of the first n natural numbers
Input:
1) n
Output:
1) sum of even
Methd:
1.start
2.Read n
3.Prit n
4.//logic for sum
   sum_e=0;
  for(i=0;i<n;i++)
   {
    sum_e = sum_e + i;
    i=i+1;
   }
5. print sum_e
6.stop

#include<iostream.h>

void main()
{
   int n,i,sum_e;

  cout<<"Enter n value";
  cin>>n;
  cout<<"\n n="<<n;

  //logic for sum
   sum_e=0;
  for(i=0;i<n;i++)
   {
    sum_e = sum_e + i;
    i=i+1;
   }
  cout<<"\n sum of n natural even numbers ="<<sum_e;
}