Bash - add text to string variable

In this article, we would like to show you how to add text to string variable in Bash.

Quick solution:

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#!/bin/bash

​

variable_name='variable_value'

variable_name+=' additional_text'

​

result="${variable_1}"

In this example, we create greeting variable inside a script.sh file and add text to it using += operator. At the end we display the variable using echo command.

script.sh file:

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#!/bin/bash

​

greeting='Hello'

greeting+=' World!'

​

echo "$greeting"

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).

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