When I clock on the receive button on blockchain, a diffrent adress appears every time I press the button.
"A new address has been created for you to receive bitcoins"
Im trying to give me adress to someone else who will be sending me bitcoins in a few days. Would I need to click the receive button right before he sends me the code? Or will this code not expire.
Addresses are created frequently to ensure your safety and anonymity from hackers. The long code is called an address and that acts like your wallet's receiving location. Money sent to that address will add to your balance. An address never expires. You only add more of those addresses into your wallet as time passes.