What is the last letter of the Greek alphabet?

The last letter of the Greek alphabet is Omega. This is because the Greek alphabet follows a specific sequence, and Omega is the final letter in that sequence. The Greek alphabet consists of 24 letters, and Omega is the last one, representing the end or finality. It is commonly used to symbolize the last or ultimate in various contexts, such as the Omega point in theology or the Omega-3 fatty acids in nutrition.