NAnt:Path system environment variable

Why do we need to create nant.bat file开发者_如何学Python in a directory that is included in the PATH system environment variable. What actually is this Path system environment variable? What if i dont do it?

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This PATH variable is used by the OS to look for folder paths when we execute a command.

If you don't do that, you will have to call nant.exe in full path which is quite annoying.