Find Exit Code of Last Command Run On The Command Line

This is how you find the exist code of the last command you ran:

echo $?

Output:

A 0 is returned if there were no problems. Any non-0 value represents an error.

For example, this will return 0 (assuming date runs properly):

date
echo $?

Output:

Sat Sep 10 11:18:59 EDT 2022
0

And this will return 1 because running false returns it like an error would

false
echo $?

Output:

-- end of line --