Concat strings in a shell script

Question

How can I concat strings in shell? Is it just...

var = 'my';
var .= 'string';

?

FYI variables in bash can't have spaces around the `=`. It has to be next to the name and the value. — Daenyth, Feb 25 '12 at 16:10

score 87 · Accepted Answer · answered Feb 25 '12 at 15:21

87

How about this:

var="${var}string"

answered Feb 25 '12 at 15:21

cnicutar

score 30 · Answer 2 · edited Feb 26 '12 at 13:32

30

It depends on the shell, but since question was tagged bash:

var='my'
var=$var'string'

edited Feb 26 '12 at 13:32

Mariusz Jamro

answered Feb 25 '12 at 15:23

dldnh

score 11 · Answer 3 · answered Feb 25 '12 at 15:22

11

No. For various reasons.

# most sh-compatible shells
var="my"
var="$var string"

# advanced shells
var="my"
var+=" string"

answered Feb 25 '12 at 15:22

3 Answers3