Lesson 3

Every lesson is a small, checked exercise. Read the brief, write the code, and run it — the checks tell you exactly what passed.

// your task

Write a function add(a, b) that returns the sum of its two arguments.

Need a hint?

A function returns a value with the return keyword. Adding two numbers uses +.

Stuck for more than 20 minutes? That is what a mentor is for.

lesson.js not run

function add(a, b) {
  // your code here
}

// output

Run the checks to see your results.

Checks for Api run on the server — coming in the sandbox phase. The editor is live so you can try the code.

All checks passed.