What are the differences between coaster brakes and hand brakes on bicycles?

Coaster brakes are activated by pedaling backward, while hand brakes are operated by squeezing levers on the handlebars. Coaster brakes are typically found on the rear wheel, while hand brakes can be on either the front or rear wheel. Hand brakes provide more precise control and are easier to modulate, while coaster brakes can be simpler to use but may not offer as much stopping power.