Sum of Even Numbers till N in C++

 Sum of Even Numbers till N

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Given a number N, print sum of all even numbers from 1 to N.

Input Format :
Integer N
Output Format :
Required Sum
Sample Input 1 :
 6
Sample Output 1 :
12
#include<iostream>
using namespace std;


int main(){

        /*  
        Read input as specified in the question.
        Print output as specified in the question.
    */
    int n;
    cin>>n;
    int i=1;
    int sum=0;
    while(n>=i){
        if(i%2==0)sum+=i;
        i++;
    }
    cout<<sum<<endl;
  
}

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