Wifi password not working on MacBook Pro

Wifi password not working
I got a MacBook Pro today. The previous owner had Apple wipe it clean for the new owner, me. When I first tried putting my wifi password in, I wasn't remembering exactly what it was, so I tried many different possibilities. Since then, I found my password in my office. I put it in, when it asked for it. But, it's not taking it. It just says searching for networks. And, this is after I identified the correct network. So, I am wondering if perhaps after a number of "tries" does it not accept ANY further attempts ? You know like Banking passwords....you get locked out. I'm wondering if I'm locked out? 

No, not like a bank timeout.
Open keychain in your Utilities Folder and look for old router password, or delete wrong passwords.
You can always reset your router password to something new that you can remember.

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