Rust Constants

Constant variables are used to store values that never change.

Unlike regular variables, constants must be defined with a type (e.g. i32 or char ).

To create a constant, use the const keyword, followed by the name, type, and value:

You must write the type when creating a constant. You cannot let Rust guess the type like you can with regular variables:

Another thing about constants, is that it is considered good practice to declare them with uppercase.

It is not required, but useful for code readability and common for Rust programmers: