Bash Scripting Count only files we own

[AplexTM 3]

#!/bin/bash
# Counting the number of lines in a list of files
# for loop over arguments
# count only those files I am owner of

if [ $# -lt 1 ]
then
 echo "Usage: $0 file ..."
 exit 1
fi

echo "$0 counts the lines of code" 
l=0
n=0
s=0
for f in $*
do
 if [ -O $f ] # checks whether file owner is running the script
 then 
     l=`wc -l $f | sed 's/^\([0-9]*\).*$/\1/'`
     echo "$f: $l"
     n=$[ $n + 1 ]
     s=$[ $s + $l ]
 else
     continue
 fi
done

echo "$n files in total, with $s lines in total"