Length of a Variable in Bash

In Bash, you can determine the length of a variable, which is the number of characters it contains, using the ${#variable} syntax. Here’s an example:

#!/bin/bash

string="Hello, World!"
length=${#string}
echo "Length: $length"

In this example, the ${#string} expression is used to calculate the length of the string variable and store it in the length variable. The echo statement then displays the length.

When you run this script, it will output:

Length: 13

The ${#variable} syntax can be used to determine the length of variables containing strings, arrays, or any other data type. It provides a simple way to obtain the length of a variable’s value in Bash.