How to concatenate two strings in a bash script?
Example: I would like to concate "foo" and "bar", but WITHOUT creating a new variable for "bar".
VAR="foo"
echo "$VARbar"
This does not work, because it is considered as variable name VARbar.
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3 Answers
This can work:
echo "${VAR}bar"
if you put brackets " wrapping the name, you can concatenate it as desired. With it, bash understands the name of the variable is just "VAR" and the rest is just text.
Comments
Use {} to distinguish the variable name i.e.
echo "${VAR}bar"
Comments
bash_prompt$ l="aaa"
bash_prompt$ m="bbb"
bash_prompt$ n=$l$m
bash_prompt$ echo $n
bash_prompt$ aaabbb
bash_prompt$ n=$l"bbb"
bash_prompt$ echo $n
bash_prompt$ aaabbb
Bash does string concatenation by default
2 Comments
fedorqui
I suggest to delete leading
$ that confuse the answer. Also, make sure you are answering the question. The OP wants to echo $VARbar and to output foobar. Your examples are correct but do not answer it.
abasu
check
WITHOUT creating a new variable for "bar". echo $VARbar is what he thought can be an approach, but not necessarily must be . Sorry for the leading $, i copy pested them (my PS1 is just odd, i agree :P) I'll make the change