let and const

Declare variables with let (can change) and const (cannot be reassigned):

const name = "Anna";
let score = 0;
score = score + 10;
console.log(name, score); // Anna 10

Shorthand: score += 10 is the same as score = score + 10.

Challenge

1. Declare a variable score with let and the value 10.
2. Increase it by 5.
3. Print score to the console.