Python (only repl.it):

import replit
print("Hello World")
replit.clear()

C/C++ (Linux)

#include <ncurses.h>

int main(){
  WINDOW * wnd = initscr();
  printw("Hello World");
  refresh();
  clear();
}

General solution (the crappy way, pseudocode):

var i = 0;
while i < 1000 :
  inc i;
  print('\n');