Bash Script - Read file for bash

[Method 1]
read -p "Please enter your file name: "  file
cat $file | while read line
do
    echo "Line ${line[$i]}"
    #印出file內的所有欄位
done

[Method 2]
read -p "file name: " file_name
while read line
do
    echo "${line}"
done < $file_name