Variables
Rust provides type safety via static typing. Variable bindings are made with
let
:
Speaker Notes
This slide should take about 5 minutes.
-
Uncomment the
x = 20
to demonstrate that variables are immutable by default. Add themut
keyword to allow changes. -
Warnings are enabled for this slide, such as for unused variables or unnecessary
mut
. These are omitted in most slides to avoid distracting warnings. Try removing the mutation but leaving themut
keyword in place. -
The
i32
here is the type of the variable. This must be known at compile time, but type inference (covered later) allows the programmer to omit it in many cases.