Let and Const

Choose between a reassignable let and a fixed const.

let_const.js

let count = ;
const step = 2;
count = count + step;
const label = "count:" + count;

console.log("step=" + step);
console.log("count=" + count);
console.log("label=" + label);

let count = ;
const step = 2;
count = count + step;
const label = "count:" + count;

console.log("step=" + step);
console.log("count=" + count);
console.log("label=" + label);

let count = ;
const step = 2;
count = count + step;
const label = "count:" + count;

console.log("step=" + step);
console.log("count=" + count);
console.log("label=" + label);

let-const Use `let` for a binding that will change and `const` for one that stays fixed. Reassigning a `let` updates the value the next expressions see.