Question 3

3.sh

#!/bin/bash

# Run a bunch of checks on the data entered
if [ "$#" -lt 2 ] || [ "$#" -gt 2 ]
then
	echo "Usage '$0 <starting number> <ending number>'";
	exit;
fi

if [ $1 -lt 0 ]
then
	echo "The starting number must be >=0.";
	exit;
fi

if [ $2 -gt 100000 ]
then
	echo "The ending number must be <=100000.";
	exit;
fi

if [ $2 -lt $1 ]
then
	echo "The starting number must be less than the ending number.";
	exit;
fi

# Prepare for output
echo -n "[";

# Loop through the numbers and echo the odd ones
for i in $(seq $1 $2)
do
	if [ $(( i % 2)) -ne 0 ]
	then
		echo -n " $i";
	fi
done

# Close final output
echo " ]";