See diagrams at the link.
Almost all pure jets use a straight through system. Look at where the air comes in, walk around it, and you’ll see where the air comes out.
https://en.wikipedia.org/wiki/Components_of_jet_engines
There are some turboprops where the exhaust isn’t in-line usually angled out toward the side or downward
https://en.wikipedia.org/wiki/Turboprop
For a good view of where the exhaust comes out, see about the 2:25 point on this video. https://www.youtube.com/watch?v=7S88FsFE5EE
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