JavaScript workshop · About 10 minutes

Build a score counter.

Follow one small program from the first line to a working scoreboard. Take your time; you can correct every mistake.

Step 1 of 5 · Meet the two parts of the program.

One function. Every point counts.

let score = 0 stores a number that can change. The function addPoints receives a number named points.

score += points adds those points to the existing score. Calling the function twice keeps both additions. Finally, console.log prints the result.

Prerequisite: you can type letters, numbers and basic symbols. We will explain the JavaScript as we go.

score.js · JavaScript

1let score = 0;2function addPoints(points) {3  score += points;4}5addPoints(3);6addPoints(2);7console.log(score);