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

In my opinion, the simplest way to concatenate two strings is to write a function that does it for you, then use that function.

function concat ()
{
    prefix=$1
    suffix=$2

    echo "${prefix}${suffix}"
}

foo="Super"
bar="man"

concat $foo $bar   # Superman

alien=$(concat $foo $bar)

echo $alien        # Superman