Bash - concatenate two string variables

In this article, we would like to show you how to concatenate string variables in Bash.

Quick solution:

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#!/bin/bash

​

variable_1='text_1'

variable_2='text_2'

​

result="${variable_1}${variable_2}"

In this example, we create a and b variables inside a script.sh file and concatenate them into one - result with space between them. At the end we display the result using echo command.

script.sh file:

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#!/bin/bash

​

a='Hello'

b='World!'

​

result="$a $b"

​

echo "$result"

Run in command line:

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./script.sh

Output:

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Hello World!

Note:

In this case, we don't need curly braces ({}). They are needed only when we want to limit variable name (explicitly indicate variable name).