Shell Programming and Scripting

#!/bin/bash
LIMIT=24
for ((a=1; a <= LIMIT ; a++))  # Double parentheses, and "LIMIT" with no "$".
do
  echo -n "$a "
done                           # A construct borrowed from 'ksh93'.
echo; echo

#!/bin/bash
NUMBERS="1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24"
for number in `echo $NUMBERS`  # would be similar to: for number in 1 .. 24
do
  echo -n "$number "
done
echo

#!/usr/bin/perl
for $i (1 .. 24) {
    print $i, "\n";
}

perl -e 'for $i (1 .. 24) { print $i, "\n"; }'