This type of camera cannot be purchased as the camera body only because the lens is built into the camera body, But with an advanced camera body (such as with a digital SLR camera, or DSLR, or a mirrorless interchangeable lens camera, or ILC), the lenses can be removed from the camera body.
As the name suggests, these cameras feature a lens build into the body of the camera. They are good for general point-and-shoot purposes because their field of view limits the captured images.