How to Find the length of a string bash |shell script programming

The length of a string is the number of characters in it. It is straightforward to know the length of a string for normal text.

This post explains ways to count the number of characters in a string with UTF encoding.

String length in Bash

There are several ways we can find the length of a string.

The first way, use the ${#variable} syntax.

In this, find the string variable length.

msg="Hello World."
count=${#msg} 

echo $count # 12

Output:

The second way, using the wc -m pipe symbol with an echo string variable.

It can find the length using a string or variable.

echo -n 'Hello World.' | wc -m; # 12

result=`echo -n $msg | wc -m`   
echo $result # 12

result1=`echo  $msg | wc -m`   
echo $result1 # 12

Output:

12
12
12