how to buy a coin, in this case we will take Ethereum as an example.

First of all you must have a wallet, your choice of whether a software wallet or a hardware wallet.
If you don’t know the difference, check our article dedicated to what the various types of wallets are.

After that, find your ethereum address.

After you log into your favorite exchange, check that you have enough funds and make your ethereum purchase.

Go to your wallet page on the exchange, look for your newly purchased eths and withdraw your coins. At this time, you will need the address of your wallet that we searched for earlier.
Enter the address, confirm the transaction and you will see your eth pass from the exchange to your wallet.
All in a very simple way.