Shell Script Variable Manipulation

Question

I've got this script:

for f in "$@"
do
    q=${f#*Media/Music/}
    echo q
done

All I want to do is set q to f after Media/Music/.

But it just echoes nothing.

If I do echo "${f#*Media/Music/}" then it gives me my result.

Why isn't this working?

NobodyElse · Answer 1 · 2013-04-17 16:46:20Z

up vote 0 down vote

You should use $ or ${} to get a variable.

for f in "$@"
do
    q=${f#*Media/Music/}
    echo $q   # here use $q it'll work fine.
done

answered Apr 17 at 16:46

NobodyElse
58319

Tushar Makkar · Answer 2 · 2013-04-17 17:24:20Z

up vote 0 down vote

You need to add $ for printing the variable.It is printing nothing because by default the value of a variable is initialized to NULL. You need to use

echo $q

instead of

echo q

answered Apr 17 at 17:24

Tushar Makkar
175

2 Answers