What are functions and why are they important in programming?

A function is group of code that has a certain task that performs a certain task. There are starting functions, return functions, and one that contains a lot statement that defines the function itself. It is important because functions are in most coding project it might be small but it is there.

Binary

 Explain what binary, octal, and hexadecimal numbers are, and why they're important to computer science.
Binary are number with just 1's and 0's, octal are numbers from 1-7, hexadecimals are numbers with numbers from 0-9 the a-f. All these binary are used to communicate from user to the computer, so its important so the computer can respond to the user efficiently.