when upload my program then show error
Arduino: 1.8.5 (Windows 7), Board: "Arduino/Genuino Uno"
Sketch uses 2112 bytes (6%) of program storage space. Maximum is 32256 bytes.
Global variables use 52 bytes (2%) of dynamic memory, leaving 1996 bytes for local variables. Maximum is 2048 bytes.
avrdude: ser_open(): can't open device "\.\COM1": The system cannot find the file specified.
Did you try the suggestions in the[ troubleshooting post](http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.)? If you have and it did not help, look at the Forum Support paragraph and respond with the requested information.
Sketch uses 1018 bytes (3%) of program storage space. Maximum is 30720 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Maximum is 2048 bytes.
An error occurred while uploading the sketch
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.