$x = 1;   # integer
  $y = 6;   # integer
  for( 1 .. 10 )
  {
    $start_pt="$x.$y";   # string
    print " $start_pt ";
    $y++;
  }
  # 1.6  1.7  1.8  1.9  1.10  1.11  1.12  1.13  1.14  1.15