Mainly two: raw hexadecimal and Wallet Import Format (WIF).
It's a binary world! 🔢🌐🗝️
Can you give an example of a raw hexadecimal?
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Sure! A raw hex private key looks like this: 1E99423A4ED... but longer. Always keep it secret!
Shhh, it's a crypto secret! 🔐🤫🔢
How is it different from a hexa decimal?