Values and variables ​

let gives a value a name. A let binding cannot be reassigned; let mut can. const is for values that never change.

let language = "Pleno";
let mut visits = 0;
visits += 1;
const MAX_VISITS = 3;

The basic values are numbers (Int like 42, Float like 3.5), strings, true and false, and null.

Reassigning a plain let is an error, which catches mistakes early. Try adding language = "Other"; and running it.

Your turn ​

total should count from 0 up to 3, but the program fails. Fix it.