Recipe: Iterating through line, word, character in a file

Iterate through each line
=========================

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


Iterate through each word in a line
===================================

for word in $line;
do
	echo $word;
done

Iterate through each character in a word
========================================
s
for((i=0;i<${#word};i++))
do
		echo ${word:i:1} ;
done