How do I use the define directive in programming?

What is the define directive and how do I use it?

The define directive is used to create constants or macros in programming. It allows you to define a value that can be reused throughout your code.

Can you give me an example of how to use it in C?

Sure! In C, you can use it like this: #define PI 3.14. This defines a constant named PI that you can use in your calculations.

Are there any best practices for using the define directive?

Yes, it's best to use uppercase letters for constants, and avoid defining complex expressions to keep your code clear.

What are the differences between define and const?

The define directive is a preprocessor directive, while const is a type-safe way to define constants in C. const can be used with different data types.