Download sequentially named files from command line

wgetseq.sh

#!/bin/bash
#
# Author: Peter Toi
# Source: https://gist.github.com/petertoi/b61ac28f2cd27a2c645d
#
# Usage 1: $ wgetseq.sh			# No argument will result in prompts
# Usage 2: $ wgetseq.sh starturl endurl startnum endnum  	# Skip the prompts by including the arguments
 
if [ "$#" -eq 4 ]
then
	starturl=$1
	endurl=$2
	startnum=$3
	endnum=$4
else
	echo "Start URL (i.e.: http://domain.com/image-): "
	read starturl
	echo "End URL (i.e.: .jpg): "
	read endurl
	echo "Start Num: "
	read startnum
	echo "End Num: "
	read endnum
fi

for i in `seq $startnum $endnum`;
do
        echo "Downloading: "$starturl$i$endurl
        wget $starturl$i$endurl
done