Advanced Bash−Scripting Guide

echo 'IFS=":", using "$@"'
c=0
for i in "$@"
do echo "$((c+=1)): [$i]"
done
echo −−−
echo 'IFS=":", using $@'
c=0
for i in $@
do echo "$((c+=1)): [$i]"
done
echo −−−
var=$@
echo 'IFS=":", using $var (var=$@)'
c=0
for i in $var
do echo "$((c+=1)): [$i]"
done
echo −−−
echo 'IFS=":", using "$var" (var=$@)'
c=0
for i in "$var"
do echo "$((c+=1)): [$i]"
done
echo −−−
var="$@"
echo 'IFS=":", using "$var" (var="$@")'
c=0
for i in "$var"
do echo "$((c+=1)): [$i]"
done
echo −−−
echo 'IFS=":", using $var (var="$@")'
c=0
for i in $var
do echo "$((c+=1)): [$i]"
done
echo
# Try this script with ksh or zsh −y.
exit 0
Advanced Bash−Scripting Guide
# This example script by Stephane Chazelas,
# and slightly modified by the document author.
The $@ and $* parameters differ only when between double quotes.
Example 9−8. $* and $@ when $IFS is empty
#!/bin/bash
# If $IFS set, but empty,
Chapter 9. Variables Revisited 77