arduino portsnot available

i have installed the programming software for arduino uno programming but when i open the tools in it the port option is not opening.
i have checked in the device manager also but nothing is showed there . The port is not displayed.
i want its solution what to do?

Do you have an original Arduino (what type?) or a Chinese clone.
For a clone you need a special driver to have your Operating system (ist it Windows, what version?) detect the Arduino.

Check if you have a CH340 chip on board, if so, google for "CH340 driver, download" and go to the manufacturer's website, download, install and have your PC detect the Arduino.

Then select the right port (have a look at the device manager), the right board Nano, Uno, ..) and go.