What is the main reason why computers use binary?

The main reason why computers use binary numbers is that computers can only process instructions and data in binary coded form, so all information must be converted into binary form.

It can also be said that the main reason why computers use binary is that 1 can be used for logical operations. 2. The algorithm is simple. 3. The two-state system is easy to realize and has low cost. In a word, binary numbers are the best choice for computers at present.