I want to do something when the key is released, so I put it
if (glfwGetKey(window, GLFW_KEY_UP))
{
         if (glfwGetKey(window, GLFW_KEY_UP) == GLFW_PRESS)
         {
                     cout << "press" << glGetString(GL_VERSION) << endl;
         }
         else if (glfwGetKey(window, GLFW_KEY_UP) == GLFW_RELEASE)
         {
                     cout << "release" << glGetString(GL_VERSION) << endl;
         }

}
But it never print "release" after I released the key. May I know what's the error done here?