Why is the number of lines in my bash output showing as 4 instead of 3?

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The user executed the command "ps -ly" in bash, which produced an output of three lines. However, when piping this output to "wc -l," the line count returned was four. After checking the output in a file opened with vim, the user confirmed there were indeed only three lines. The discrepancy in line count was resolved, leading the user to request the deletion of the thread after finding an answer.
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TL;DR Summary
Using command ps -ly I get output of three lines
piping that output to wc -l it says that there are four lines. Why
In bash, I am writing the following:

ps - ly

this command gives me output of three lines

then I do:

ps -ly | wc -l

to read the number of lines. It says 4.

I clearly see that there are three lines. Thinking that there might be a new line possibly, I open export the command output to a file and open it in vim and no, there are just three lines.

I am wondering why the number is 4?
 
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hmm wrong forum maybe this should go to programming and computer science instead? Can I get a mod to help me out

edit: actually please delete this thread I have my answer now :) thank you
 
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