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How can I count all characters in a bash variable? For instance, if I had
"stackoverflow" the result should be
"13" 
477
'#' symbol can be used to count the length of the string without using any command. `expr` command can be used by two ways to count the length of a string. Without `expr`, `wc` and `awk` command can also be used to count the length of a string.
The most easiest way to count the number of lines, words, and characters in text file is to use the Linux command “wc” in terminal. The command “wc” basically means “word count” and with different optional parameters one can use it to count the number of lines, words, and characters in a text file.
Increment Bash Variable with += Operator Another common operator which can be used to increment a bash variable is the += operator. This operator is a short form for the sum operator. The first operand and the result variable name are the same and assigned with a single statement.
Using the ${#VAR} syntax will calculate the number of characters in a variable.
https://www.gnu.org/software/bash/manual/bashref.html#Shell-Parameter-Expansion
96
Use the wc utility with the print the byte counts (-c) option:
$ SO="stackoverflow" $ echo -n "$SO" | wc -c 13 You'll have to use the do not output the trailing newline (-n) option for echo. Otherwise, the newline character will also be counted.
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