bash script read file

FILE='/etc/passwd'
x=0
while [ $x -lt $(cat $FILE | wc -l) ]
do
   let x=x+1
   head -n $x $FILE | tail -n 1
done

$ while read line; do echo -e "$line\n"; done < file.txt

Reference :
bash shell script read file line by line
How to read a file line by line