read
Input from file
Line separate
IFS=" "
while read i ; do echo $i; done < input.txt
Space separate
IFS=" "
for i in $(cat ./input.txt) ; do echo $i; done
Line separate
IFS=" "
while read i ; do echo $i; done < input.txt
Space separate
IFS=" "
for i in $(cat ./input.txt) ; do echo $i; done