command question

I hate to ask home work questions, but I simply can not find my answer in
notes.. What command would one use to print the exit status of the last
command executed?
I am thinking it uses a | but I can not find the answer anywhere. Thanks in
advance.
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2:39pm up 124 days 21:52, 3 users, load average: 0.35, 0.41, 0.23
Linux

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