#!/usr/bin/env tsh
:
: tsh - " Force sh(1), csh(1), and other shells to exit w/ error! " <'' ;;;
:
: "  @(#)$Id: 05647d25888c73cc5c289ca966068b26245bf1c3 $  "
:
: "  The author of this file, J.A. Neitzel <jan (at) etsh (dot) io>,  "
: "  hereby grants it to the public domain.                           "
:

:
: "  This command file demonstrates using `shift' to control    "
: "  loop iteration, counting from 1 to 20 (by ones, by evens,  "
: "  and by odds) in 3 separate shell loops.                    "
:
: "  usage: counts  "
:

: 1
tsh - 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ; echo ; echo ; goto 2

	echo -n 'Count (1 -> 20): '
	: Count
		echo -n \ $1
		shift
		if X$1 = X exit
		goto Count

: 2
tsh - 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ; echo ; echo ; goto 3

	echo -n 'Evens (1 -> 20): '
	shift
	: Evens
		echo -n \ $1
		if X$2 = X exit
		: " Skip the next odd number... " ; shift ; shift ; goto Evens

: 3
tsh - 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ; echo

	echo -n ' Odds (1 -> 20): '
	: Odds
		echo -n \ $1
		if X$3 = X exit
		: " Skip the next even number... " ; shift ; shift ; goto Odds