saving . . . saved Problem uploading to board. has been deleted. Problem uploading to board. has been hidden .
Problem uploading to board.
The error message is as shown below
avrdude: ser_open(): can't open device "\\\\.\\COM1": The system cannot find the file specified.

Arduino uno is  physically connected to computer but in menu "port" option show nothing.
i am using window 10 OS.

Arduino First-Arduino-Program 04-05 min 40-50 sec 08-09-18, 12:33 a.m. 12_jaydeep


Please go through the Additional Reading material link of the "First-Arduino program" tutorial.
Use command line to execute the commands as you are using Windows.

Information about errors and solutions are given in the below link.
10-09-18, noon NirmalaVenkat

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