Editing Count number of characters (section)

== How to count characters with BASH ==
Step1: Using [https://www.computerhope.com/unix/uwc.htm Linux wc command]
<pre>
# Count the total number of characters in a file named "input.txt", while ignoring all whitespace characters (including spaces, tabs, newlines, etc.).
tr -d '\r\n[:space:]' < input.txt | wc -m
</pre>


<pre>
# print the character counts of txt files (contains the count of return symbol)
wc -m *.txt

# print the newline counts of txt files
wc -l *.txt

# print the whitespaces counts of txt files
grep -c ' ' *.txt
</pre>

Step2: Check the [[Return symbol]]
* e.g. {{kbd | key=<nowiki>\r\n</nowiki>}} costs 2 characters

Step3: final formula

Number of characters (not contains the [[Return symbol | return symbol]]) = result of {{kbd | key=<nowiki>wc -m *.txt</nowiki>}} - result of {{kbd | key=<nowiki>wc -m *.txt</nowiki>}} * 2 - 1 (the last blank line costs 1 character) - number of the whitespaces