bash question
 

Does anyone know what the difference between the following is?

TEST="this test"

echo $TEST
response: this test

echo ${TEST}
resopnse: this test

so I was wondering what the {} in the second echo statement does different then the first one



Thanks

the { } is used for what is called "brace expansion". To get an idea what it does, do these:

echo {a,z}

echo {a..z}

In your example, the braces do nothing.

that does not work for variables

i think it is used for an array

like
${TEST[2]}
which would out put the 3rd entry in the array


thanks

Copy & paste that (including the empty line) into
an xterm or similar :}


Cheers,
Tink