Project between client and server chat program. First, the server must be run and the port number must be entered to the command line. Then the client should be run by entering the port number and ip address. After the connection is established, the server or the client can send the first message. The message size is maximum 1024 . In order to complete the last chat, the ‘bye’ string must be entered. In addition, our program performs error checking where necessary. Indicates the cause of the error to the user.