How to display main navigation in my sharepoint site?

I have created HTML template for my SharePoint site. On top of this site I want to display main navigation but I don't know the code to place which will display navigation.

I know under "Site Settings" there is "Navigation" option but I am looking for a code something like below which will display default navigation and then I can customize it according to my needs.

    SharePoint:NavigationShow()

So I need that code which I will copy paste in the area in my HTM where I want default navigation to appear.