How does friction affect the law of inertia?

The law of inertia states that an object will keep moving at a constant speed unless a force is applied to it and friction is the force.

The law of inertia states that an object will keep moving at a constant speed unless a force is applied to it. Friction is a force: it is a force that slows objects down. Without it, objects would carry on moving at the same speed without slowing down.