Try this;

code:
$n = 1
while $n < 156
select
   case len("$n") = 1
        $a = "apps00"
   case len("$n") = 2
        $a = "apps0"
   case len("$n") = 3
        $a = "apps"
endselect
   $x = "$a" + "$n"
   shell "%comspec% /c echo $x >> file.txt"
   $n = 1 + $n
loop

or this;


code:
? "Enter a number less than 155: " gets $n
$n = val("$n")
while $n < 156
select
   case len("$n") = 1
        $a = "apps00"
   case len("$n") = 2
        $a = "apps0"
   case len("$n") = 3
        $a = "apps"
endselect
   $x = "$a" + "$n"
   shell "%comspec% /c echo $x >> file.txt"
   $n = 1 + $n
loop
exit

------------------
BoxKite
FACTA NON VERBA

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Box
FACTA NON VERBA