fastboot: usage: no command Basic information: Windows - Android SDK - fastboot.exe
As the title says.. fastboot won't work in my cmd and fails with the output: fastboot: usage: no command. The android-sdk is located in the root directory (C:\). I also add the pathvariables in the system environment. I don’t try it with an android device, I only test if the command responds, but yeah it did not...! So I actually do everything like it's described in the tutorials, but can't find my mistake.
Did anyone have this problem or does know a solution?
Use fastboot --help instead. This is a kinda standard way to get usage help in Linux world. However sometimes writing only the command name also works as you expect.

Reference:

if (argc == 0) {
    usage();
    return 0;
}