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I have received the bitcoin way back in 2013 in Bitcoin Core. At that time I don't know about the importance of wallet.dat - I have formatted my hard disk and install Bitcoin Core again in 2017 but there it didn't show my Bitcoin in my balance. I have my Bitcoin Key.

I meant "Bitcoin Key" is my Public Key on which I got my bitcoin. Is there any other way to get my Bitcoin back if I didn't get my original wallet.dat of Bitcoin Core?

How can I get my bitcoin back?
How can I get to know my Private Key?

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Your money is lost without at least one of

  • a backup of important data from the hard disk before it was formatted
  • a backup of the wallet.dat file
  • a note of the private key

There is no way to recover the private key from other information. If there was, Bitcoin would be completely unsafe and unusable.

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How can I get to know my Private Key?

That's what your wallet.dat contained. You cannot get that back if you've lost your wallet.dat. Otherwise, Bitcoin would be worth $0 as anyone could just "make up" private keys with any amount of Bitcoin.

Since the wallet.dat was long deleted, re-installing Bitcoin Core is insufficient—there is nothing left for Bitcoin Core to guess your old key.

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  • I meant "Bitcoin Key" is my Public Key on which I got my bitcoin. Is there any other way to get my Bitcoin back if I didn't get my original wallet.dat of Bitcoin Core? May 2 at 5:48
  • If you lost your wallet.dat, have no backups or dumps of it, I'm afraid there is no way to recover your coins. May 2 at 6:35
  • Oh..okay.Thansk for your comment. May 2 at 7:35
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    Hi Coiner, I edited your answer to remove rude phrasing. We expect users on this site to respectfully communicate with each other.
    – Murch
    May 2 at 14:23

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