Write a C program to display the sum of ‘n’ terms of even numbers

#include<stdio.h>

#include<conio.h>

void main()

  {

    int i,n,s=0,a=2;

    clrscr();

    printf("\nEnter how many numbers? ");

    scanf("%d",&n);

    for(i=0;i<n;i++)

     {

       s+=a;

       a=a+2;

     }

    printf("\n Sum of %d terms of even numbers is %d",n,s);

  getch();

  }