move_sequential.bash

#!/bin/bash

function move_sequential {
  if [[ $# != 4 ]]; then
    echo Usage: move_sequential <prefix> <first number to move, inclusive> <last number to move, inclusive> <suffix>
    return 1
  fi

  PREFIX=$1
  FIRST=$2
  LAST=$3
  SUFFIX=$4

  DIR="mv_$FIRST_$LAST"
  mkdir $DIR

  if [[ $? != 0 ]]; then
    echo "Folder $DIR already exists :/"
    return 2
  fi

  $IDX=1
  for i in {$FIRST..$LAST}; do
    NUM=`printf '%04d' $i`
    NEWNUM=`printf '%04d' $IDX`
    echo mv DSC_$NUM.JPG $DIR/DSC_$NEWNUM.JPG
    $IDX=$(($IDX+1))
  done
}

#untested, also an 'echo' instead of an actual mv for testing purposes