How to concatenate string variables in Bash

Question

In PHP, strings are concatenated together as follows:

$foo = \"Hello\";
$foo .= \" World\";

Here, $foo becomes \"Hello World\"

Answer 1

You can concatenate without the quotes. Here is an example:

$Variable1 Open
$Variable2 Systems
$Variable3 $Variable1$Variable2
$echo $Variable3

This last statement would print "OpenSystems" (without quotes).

This is an example of a Bash script:

v1=hello
v2=world
v3="$v1       $v2"
echo $v3            # Output: hello world
echo "$v3"          # Output: hello       world