bash: iterating through txt file lines can't read last line

Question

while read p; do
echo $p
done < file.txt

this code can read all lines in the file.txt except the last line any

Answer 1

cat file.txt and see if the very last line has a new line at the end of the last line or not. If it does not then while read p ; do echo $p done < file.txt won't echo the last line put a new-line at the end of the last line in the text file