example foreach loop
.control

* set values by numbers
foreach val -40 -20 0 20 40
  echo var is $val
end
echo
*set values by variable
set myvariable = ( -4 -2 0 2 4 )
foreach var $myvariable
  echo var is $var
end
echo
* set values by vector
let myvec = vector(5)
foreach var $&myvec
  echo var is $var
end

.endc

.end