What was the main function of the ENIAC computer?

The main function of the ENIAC computer was to perform complex calculations for military purposes. Developed in the 1940s, ENIAC was one of the earliest electronic general-purpose computers. It was primarily designed to calculate artillery firing tables for the United States Army during World War II, which required extensive mathematical computations.

This significant focus on military applications illustrates why ENIAC was a groundbreaking advancement in computational technology at the time, enabling the speedy resolution of calculations that were previously done manually and took a considerable amount of time. Although later computers would evolve into more versatile systems, ENIAC's role in assisting military operations underscores its foundational importance in the history of computing.

Other options do not accurately reflect ENIAC's purpose; it was not designed for personal use, database management, or graphic creation, which are applications of later technological advancements.