Computer science is the field of writing code and scripts on the computer to instruct it to perform certain tasks.

Computer science is the field of writing code and scripts on the computer to instruct it to perform certain tasks.
While this is true, you're missing the big picture.

The core of computer science is really the study of algorithms, and an algorithm is a series of steps needed to solve a problem. An algorithm can be actual code, or it can be a theory or a generic statement.

I would simply say; computer science is; study of computer, how computer hardware and software works, interact with each other.