I have some ether in an exchange but when I searched it on etherscan.io it is showing
There are no matching entries
there I got to know exchanges have the balances on their own wallet address, but if my address(from exchange account) is not there on blockchain how I am able to send ether from outside my exchange account to the address?
Best Answer
By "exchange" I assume you mean a centralized exchange.
Exchanges do have real wallets. Whenever you deposit any asset to an exchange you send it to one of their (hot) wallets and after that the exchange's inner logic perhaps sends it somewhere further.
When trading inside an exchange it's all done inside the exchange's internal ledgers to minimize costs and delays. When you transfer assets out again the exchange sends them from a real wallet.