C++ :

#include<iostream>
#include<math.h>
using namespace std ;
int main ()
{
	int a;
	for(a=2;a<=100;a+=2)
		cout<<a<<" ";
	return 0;
}	

Pascal :

program ex1;
 var
  i,n,s:longint;

  begin
  for i:=1 to 99 do
  if i mod 2=0 then write(i,' ');
  write('100');

  end.