error message

Projects Networking, Protocols, and Devices
1

Hi , can someone give an idea about this cod

Arduino: 1.8.2 (Windows 7), Board: "Arduino/Genuino Uno"

Sketch uses 928 bytes (2%) of program storage space. Maximum is 32256 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Maximum is 2048 bytes.
avrdude: ser_open(): can't open device "\.\COM7": The system cannot find the file specified.

Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

2

Hi , can someone give an idea about this cod

No. You didn't post any fish.

The error message could hardly be more obvious. You clearly failed to select the correct port, that the Arduino is connected to.